View Cart
ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat - 25" Long x 7-1/2" Wide

ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat - 25" Long x 7-1/2" Wide

Item # 277-000163

lowest price pledge

Retail:$48.60

Our Price: $30.48

You Save: 37%
RV Fresh Water

Orders above $99 qualify for Free Shipping

Shipping Weight: 0.66 lbs

Quantity: 
In Stock, Ships Today
LaSalle Bristol Heating Elements and Pads - 277-000163
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images


  • Heating Elements and Pads
  • Holding Tank Pad
  • LaSalle Bristol
Full-contact, weatherproof heating pad helps prevent your RV holding tank or step from freezing. Built-in thermostat automatically turns the heating pad on and off depending on the temperature of the tank or step. Easy, peel-and-stick installation. Lowest Prices for the best rv fresh water from LaSalle Bristol. ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat - 25" Long x 7-1/2" Wide part number 277-000163 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (4)
  • Q & A (20)
  • Videos (1)
  • Photos
  • Why etrailer?

LaSalle Bristol RV Fresh Water - 277-000163

Full-contact, weatherproof heating pad helps prevent your RV holding tank or step from freezing. Built-in thermostat automatically turns the heating pad on and off depending on the temperature of the tank or step. Easy, peel-and-stick installation.


Features:

  • Full-contact heater pad keeps your exposed RV holding tank or step warm during freezing temperatures
    • Works with tanks with a 29- to 40-gallon capacity
    • Can also thaw out a tank system or a step if it's already frozen
  • Built-in thermostat automatically operates the heater pad
    • Turns on when the tank or step temperature reaches 45 degrees F
    • Turns off when the tank or step temperature reaches 67 degrees F
  • Flexible, weatherproof carbon fiber material bends to fit the contours of a surface
  • Easy, peel-and-stick installation onto the bottom of your tank or step
  • 2-Wire design with 16-gauge wires
    • White wire is for ground
    • Red wire is for power
  • Compatible with DC power when in transit
    • Runs through a converter while connected to a power source when your RV is parked
  • Cold room tested down to -32 degrees F
  • QAI certified


Specs:

  • Pad dimensions: 25" long x 7-1/2" wide
  • Pad thickness: 3 mm
  • Length of wires: 36"
  • Input voltage: 13.5V DC
  • Power draw: 5.8 amps
  • Wattage: 78 watts
  • 1-Year warranty


The Therma Heat RV tank and step heating pad meets the following certification standards:

  • Safety for Electric Heating Appliances, UL499
  • Safety for Heating Elements (CSA) C22.2 No. 72-m1984 (R2004)
  • Flammability tests (UL) 746C, 15 and CSA 0.17,9,2
  • Dieletric Voltage Withstand Test (UL) - 1000 volts/1 minute
  • Thermal Aging Test (UL)

Note: This heater pad should be installed on non-conductive surfaces only.


Why ThermaHeat?

When the outside temperature is cold enough, the exposed freshwater holding tank or step on your RV will freeze. For tanks, this stops the flow of water from reaching your sink, shower, or other freshwater source. Furthermore, the frozen water could potentially cause cracks or other irreparable damage to your tank or pipes, which would mean you would have to replace them. And a frozen step can be extremely slippery as you try to enter or exit your RV or camper.


The full-contact ThermaHeat heater pad will prevent this by keeping your holding tank or step warm during freezing temperatures. It has a built-in thermostat that automatically operates the pad. When the temperature of the tank or step drops to 45 degrees F, the pad will turn on. When the temperature rises to 67 degrees F, the pad will turn off. It can also completely thaw out a tank or a step if it's already frozen, assuming that none of the components have been damaged. The heater pad does all the work for you, preventing you from having to go out in the cold and thaw it out by hand with a heat gun or hair dryer, which can melt the side of your tank or step if not used properly.


Installation and Wiring

ThermaHeat Peel-and-Stock Installation

This heater pad has easy, peel-and-stick installation onto the bottom of your tank or step. The flexible carbon fiber material is designed to fit the contours of any surface. The pad is meant for use on fresh water tanks, but can be installed onto gray water or black water tanks. Please note, however, that adding a heat source to a gray water or black water tank may create excess gasses and odors.


ThermaHeat 2-Wire Design

The pad has a white wire for ground, and a red wire for power. This 2-wire design is compatible with DC power while your RV is in transit. It can also run through a converter while connected to a power source when your RV is parked.


Additionally, you are able to install this pad with other ThermaHeat heater pads (sold separately). In order to do this, they must be connected and run parallel. You would daisy-chain the red wires together and connect them to the battery of your RV or camper and then daisy-chain the white wires together and ground them. In order to turn the pads on and off, you will need to install a switch (sold separately) between the battery and the pads.



210SLST725RTBX Therma Heat Heating Pad with Thermostat for Motor Home Water Tanks and Steps - 25" Long x 7-1/2" Wide

Alternate part number: 85854 and SL-ST725







Video of ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat - 25" Long x 7-1/2" Wide


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for LaSalle Bristol RV Fresh Water - Heating Elements and Pads - 277-000163 Review

Today we're going to be taking a look at the Thermaheat Heater Pad with the built-in thermostat for RVs. The full contact, peel and stick heater pad is going to provide heat to your steps or tanks to keep them from freezing when temperatures drop. This has been cold room tested down to -32 degrees Fahrenheit. It's going to run off DC power while the RV is in transit and through a converter when connected to a power source. The unit has a built-in thermostat, so the unit automatically turns on when temperatures reach 45 degrees Fahrenheit, and it turns off at 67 degrees Fahrenheit. Taking a look at the pad size, this is going to give us a width measurement of about 7.5 inches and the overall length measurement is going to be 25 inches. The thickness is 3 millimeters. When it comes to the voltage, we're looking at 13.5 volts with an electric current of 5.8 amps. You can see here that it's a two wire design.

These lead wires are going to measure about 36 inches long. The unit is going to use 16-gauge wiring. It has been ETL tested and approved. Right here on the sticker that's located on the pad, those are going to be your installation instructions printed directly on the front of the pad on that sticker. That's going to do it for today's look at the Thermaheat Heater Pad with the built-in thermostat for RVs.


Customer Reviews

ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat - 25" Long x 7-1/2" Wide - 277-000163

Average Customer Rating:  5.0 out of 5 stars   (4 Customer Reviews)

Full-contact, weatherproof heating pad helps prevent your RV holding tank or step from freezing. Built-in thermostat automatically turns the heating pad on and off depending on the temperature of the tank or step. Easy, peel-and-stick installation.

- 277-000163
by:

Great product! warms up the holding tank ever so efficiently. Great price, quick ship - perfect communication. Thank you etrailer!! 460616



- 277-000163
by:

Required alcohol to clean the area. Joined two (fresh water and black water) Put a fuse in the system just for incase. Fast quick delivery. I will order another if needed. Good prices! We will be telling our friends!! 606630



- 277-000163
by:

Just installed and appears to be working as advertised. The website product details really should say that minimum installation temp is 60 degrees. It doesn't! My son and I had to install it anyway. No choice. Then in stalled R2 doulbe-sided foil backed insulation under the tank ( he's going off the grid in his travel trailer) and we had to do all we could to insure his water system would not freeze. The heating pad is working and we're filling the water system tomorrow. Also the PK34310 rocker switch has absolutely no info about what terminal get connected to what wire! You really need to to have info on your website for this. After some digging online I was able to find the proper wiring connections. It would require almost no effort on etrailer's part to do this. 600346



- 277-000163
by:

Install 3 holding take heaters, 1 fresh water tank heater and 5 elbow/ pluming heaters on my trailer. All of the heaters running at the same time draws less than 300 watts so I can now leave then on when towing without having to run my propane heater in the trailer. I added R30 insulation to my underbelly and took a trip to Angel Fire NM where one night it got down to -24 degrees F. None of my tanks froze. I had one temperature probes directly on my black water tank and it was 53 degrees with the 24 outside. Every day was below freezing with temps in the lower teens each night. I believe these are rated at -11 but it is a good idea to have an enclosed underbelly to keep the rest of your pluming warm. 597730


4
4

Ask the Experts about this LaSalle Bristol RV Fresh Water
Do you have a question about this RV Fresh Water?


  • Heating Pad for Freshwater Tank on RV
  • For as big as your tanks are I would recommend going with the part # 277-000163 which measures 25 inches by 7-1/2 inches for each of your tanks. These are designed for the freshwater tanks and would not be needed on grey water.
    view full answer...

  • Can More than One Heating Pad be Used on a 100 Gallon Fresh Water Tank
  • You could use more than one holding tank heater if you wanted to and there are different options available. Pad heater # 277-000164 is one option. There is also another model, # 277-000163, with different dimensions. We also have elbow heater pad # 277-000161 (for 3 inch pipe) and # 277-000162 (for 1-1/2 inch pipe). And we have several self-regulating heating elements: # W01-1572 (15 feet), # W01-1573 (25 feet), and # W01-1574 (50 feet). These were designed for freeze protection for...
    view full answer...

  • How to Check for Proper Operation of ThermaHeat RV Holding Tank Heating Pads
  • RV holding tank heating pads like # 277-000164 and # 277-000163 operate on an automatic thermostat. The pads will automatically turn on at 45-degrees Fahrenheit and turn off at 67-degrees Fahrenheit. If you are nearby to the RV when the tanks are in a sub-45-degree environment you should be able to feel warmth from the pad if it is cycled on. I confirmed with LaSalle-Bristol, the manufacturer of ThermaHeat pads, that the thermostats in these pads read the tank surface temperature and...
    view full answer...

  • Heating Pads for 50 Gallon Fresh Water Tank
  • For your 50 gallon fresh water tank you will want to use two of the ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat # 277-000163 wired together. You can use the ThermaHeat Elbow Heating Pad # 277-000161 as well, but this is a pad for 3 inch pipes so you will want to put it there as opposed to your tank. You can wire these together in parallel by "daisy-chaining" each of the red wires together and connecting them to your RV's battery; you will then also daisy-chain the white...
    view full answer...

  • In-Line Fuses For Therma Heat RV Tank Heater Pad
  • You do need to make sure you are properly connected to fuses for a single unit as the # 277-000163. This is a thermostatically controlled pad. If you are running more than one, you need to run them parallel. It would be wise to use a combined amperage fuse as you stated. You also want to make sure if you use a switch that it can cover the amperage. Each pad draws 5.8 amps, so a 15-amp or better switch will work, like # PK34571.
    view full answer...

  • Is 13 Inch Elbow Heater Pad 277-000161 Big Enough for a 10 Gallon Tank
  • Since a 10 gallon tank is not very large the 13 inch elbow heater pad # 277-000161 could be sufficient. Although if the tanks are all right next to each other you might be able to use a total of 2 of the 25 inch by 7-1/4 inch heaters # 277-000163. Two of the 25 inch models will draw about 11.6 amps at 13.5 volts compared to 2-1/2 amps from 4 of # 277-000161. In short the 25 inch models are larger and draw more power and thus should also provide more heat when properly installed.
    view full answer...

  • Can Multiple Therma Heat Heater Pads be Wired to Single Switch
  • Multiple heating pads like the Therma Heat 25 Inch x 7-1/4 Inch # 277-000163 and the Elbow Heater Pad # 277-000162 that you have can be wired to a single switch. If you are not getting enough voltage with your current setup, it's possible that the switch you are using cannot handle the total amperage of the heating pads. The larger pads draw 5.8 amps (each) and the elbow pad draws 0.3 amps. A higher rated switch like the Pollak # PK34310 might be a better option if your existing switch...
    view full answer...

  • Compatibility of Heater for Preventing Ice on Satellite Dish
  • The Kat's Heaters Oil/Transmission Pan Heating Pad - 1" x 5" - 120V - 50W - Grounded Plug # KH26050 is not thermostat controlled. The thermostat controlled heaters like the Kat's Heaters Handi-Heat Magnetic Heater w/ Thermostat - 120V - 3-5/8" x 2-1/4" # KH1155 turns off at 275 degrees and that is way too high for your application. You will either want to install a thermostat for the heater or go another route like the 25" x 7-1/4" Heater Pad with Thermostat for RVs # 277-000163 which...
    view full answer...

  • Would the Heater Pad Part # 277-000163 Be Suitable for a 46 Gallon Water Tank
  • According to my contact at Patrick Industries, the 25" x 7-1/4" Heater Pad with Thermostat part # 277-000163 would be suitable for a 46 gallon water tank. If you were to use this heater on a water tank larger than 46 gallon then you would want to use two of them wired together but as mentioned, the one pad will work with your 46 gallon tank just fine. As you probably read, this pad has a peel and stick application with an integrated thermostat that will turn on when the water in the...
    view full answer...

  • Water Tank Heaters for Well Insulated 30 Gallon Tanks on a 2017 Ford E450 Box Van
  • ThermaHeat RV Holding Tank Heater Pad # 277-000164 or any of the others needs to be in direct contact with the tank so you would need to clear away anything that is in the way of making that direct contact. Given the amount of insulation you have you would most likely be fine with a smaller pad such as # 277-000163 which is longer at 25 inches but narrower at 7-1/4 inches. But considering what you will be doing I strongly recommend having a spare battery with you as well as an AC charger...
    view full answer...

  • Installation of Heating Pads on RV Holding Tanks
  • Holding tank heating pads such as Thermaheat 18 x 12-inch # 277-000164 and 25 x 7-inch # 277-000163 should not be trimmed or cut. When you install one of these on your plastic holding tanks you'll want to be sure to first clean the surface with 91% isopropyl alcohol (available at any pharmacy) to remove any residue that could interfere with the pressure-sensitive adhesive that will hold the pad in place.
    view full answer...

  • Can Multiple RV Heater Pads with Thermostat 277-000163 Be Wired Together
  • My contact at Patrick Industries advised that their RV Heater Pad with Thermostat # 277-000163 could be parallel wired in up to 3 pads total provided that the DC power source has enough current for the 5.8-amp draw from each pad. Typically a 15-amp circuit can handle three since they cycle on and off. These pads are suitable for your 45-gallon grey and black water tanks; one per tank is enough according to my contact. For your 70-gallon fresh water tank you'll want to use two and position...
    view full answer...

  • Can Insulating Blanket be Installed Over Therma Heat RV Holding Tank Heater Pad
  • I spoke with my contact at Therma Heat regarding the Heater Pad with Thermostat # 277-000163 referenced in your question. She stated that it is perfectly safe to install an insulating blanket over the heating pad. Please note though, that in order for the pad to be effective, it will need to be placed on the bottom of the tank, not the top. I have attached a short video demonstration on this product that you can also take a look at.
    view full answer...

  • What Type of Power Does the 25" x 7-1/4" Heater Pad with Thermostat for RVs # 277-000163 Run On
  • The 25" x 7-1/4" Heater Pad with Thermostat for RVs # 277-000163 will only produce heat when attached to a power source. If you disconnected the power source it would turn off. 12 volts is DC power though. You would need an inverter if you wanted to convert it to AC power.
    view full answer...

  • Can ThermaHeat Heater Pad be Insulated with Spray Foam
  • I spoke with my contact at ThermaHeat regarding the Heater Pad # 277-000163 that you referenced. He did state that they don't really recommend insulating the pad with foam like what you are describing, as this can potentially affect its function and may interfere with the surrounding wiring as well. The pads are designed to attach directly to the tank. I have attached a short video demonstration on the heater pad that you can also check out.
    view full answer...

  • Do RV Gray and Black Water Tanks Require Heaters
  • The good news is that you don't have to have heaters on black and gray water RV tanks. The fresh water needs a heater as you can't put any antifreeze in it. But since you don't have to worry about poisoning the water in the black and gray water tanks you can use RV antifreeze in them and not have to worry about them freezing. That said, the ThermaHeat tank pads do not have thermostats built into them.
    view full answer...

  • Should Adhesive Backing of ThermaHeat RV Holding Tank or Step Heater Pad Be Left On
  • You'll want to remove the adhesive backing of the ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat # 277-000163 before you leave it underneath a tank permanently. It probably wouldn't be a big deal in the short term but long term it's hard to say what the backing will do.
    view full answer...

  • Switch for Heating Pad 277-000163
  • As long as the switch can handle the amperage load of two of the heating pads part # 277-000163 yes it would be fine. This heating pad draws 5.8 amps. So the switch would need to be able to accommodate 9.6 amps. The part # D16740 would easily handle the amperage.
    view full answer...

  • Can the 25" x 7-1/4" Heater Pad with Thermostat # 277-000163 Be Used with a Wind and Solar System
  • The 25" x 7-1/4" Heater Pad with Thermostat # 277-000163 is typically used for RVs but if your wind and solar system is a 12V DC power system or you connect it to a DC-to-AC converter then there shouldn't be any issue with powering this pad from your wind and solar system. Please note that this heat pad is meant to be used on a water system. This heating pad has a voltage rating of 13.5V and an amp rating of 5.80A. A review video has been linked for you to reference as well.
    view full answer...

  • What is Temperature Range and Amperage Draw of ThermaHeat RV Holding Tank # 277-000164
  • The performance of the ThermaHeat RV Holding Tank # 277-000164 you referenced at 12.4 volts is going to be essentially the same as if you used it at 13.5 volts. You wouldn't really notice a difference. Based on the temperatures you mentioned this would essentially stay on all the time since you'd always below it's off temperature of 67 degrees. I wish that was adjustable but it is not. It's this temperature range as a way to prevent the temps from getting even close to freezing. Since the...
    view full answer...


Do you have a question about this RV Fresh Water?




  • Why etrailer.com?

    At etrailer.com we guarantee:

  • Highest quality rv fresh water for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate rv fresh water information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Cole B
Written by:
Mary E
Updated by:
Amanda M
Photos by:
Stacy F
Updated by:
Jenny M
Updated by:
Hannah L
Updated by:
Halie H

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!

Call 800-298-8924