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Valterra EZ Valve Electric Waste Valve for RV Black Water Tank - 3" Hub to 3" Spigot
(127 reviews)
Price: $232.21
In Stock
Valterra
Valterra EZ Valve Electric Waste Valve for RV Black Water Tank - 3" Hub to 3" Spigot
Part Number: E40-8
In Stock
$232.21
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- All Info
- Reviews (127)
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Valterra RV Waste Valve - E40-8
- Single Waste Valve
- Electric
- 3 Inch Valve Body
- Straight Valve
- 3 Inch Hub
- 3 Inch Spigot
- Valterra
- Stationary Valve
Replace the standard waste valve on your RV's black-water tank with this electric one so that you can open and close the valve with the flip of a switch. Light comes on when valve is open. Wiring harness and 2 switch plates included.
Features:
- Electric waste valve replaces or upgrades the waste valve on your RV's black-water tank
- Easy operation with the flip of a switch
- Valve opens to allow flow from your black-water tank
- Light comes on when valve is open
- Tool-free manual override
- Remove pin, turn handle, and pull handle to open valve
- High-torque, water-resistant electric motor
- Built-in 5-amp breaker provides circuit protection
- Resets with a push of a button - no fuses to replace
- 3" Hub slides over your sewer pipe
- 3" Spigot slides into your sewer pipe
- Wiring harness, black and gray switch plates, seals, hardware, and installation instructions included
- Switch plate installs in RV's control compartment
- ABS solvent bond (A05-0303) sold separately for installation of valve
- Compatible with 12V systems
Specs:
- Passage diameter: 3"
- Wiring length: 8'
- Valve harness: 1'
- Switch harness: 7'
- Power draw: 2.5 amps
- 1-Year warranty
The switch plate, wiring, seals, and hardware needed to install this electric waste valve on your RV's black water tank are included. The switch plate installs in the RV's control panel. The waste valve secures to existing pipes using ABS solvent cement (A05-0303 - sold separately). A booklet with step-by-step instructions and a template for drilling are also included.
You can also adapt the valve to work with your gray-water tank. A gray switch plate is included for that purpose. For this installation, you will need to use adapters (sold separately) to convert the valve opening from 3" to 1-1/2" in diameter.
If you're dry camping or in the case of a power failure, the manual override is easy to use. Simply remove the pin from the valve's lift arm and turn the handle 90 degrees clockwise. Then pull the handle to open the valve.
E40-8 Valterra Easy Valve Electric Sewer Waste Valve System for Motorhome - 3" Hub x 3" Spigot
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
- Arrived Damaged
- Did not arrive in time
- Alternate product found
Ratings & Reviews
4.7
127 reviews
by:
Charles
01/11/2023
I installed 3 of these valves on my RV, i've had them for a year now with no problems with the valves themselves the only issue was one of the switch red lights that lets you know it's open went out but really don't need it, I am very pleased
by:
Darryl
10/08/2025
Fast service, product works great
by:
Bryan
04/18/2025
Connected it to a small duck pond drainage system. Has worked flawlessly even during could winter months.
Bryan
4/19/2026
Still going strong. No issues with any of the mechanics. Has worked 100 of the time. Would definitely purchase again
by:
Saba
10/08/2024
It’s been a year now since I installed this control valve.
I am very pleased that it works perfectly. I will be buying two more for my other two tanks. I highly recommend this purchase.
I am very pleased that it works perfectly. I will be buying two more for my other two tanks. I highly recommend this purchase.
by:
Jack
04/22/2024
Switch installed backwards
by:
Brian
05/14/2026
by:
William
08/18/2023
by:
William
12/13/2021
by:
Alan
10/28/2026
THe unit is fine and looks good. NO INSTRUCTIONS OR HOLE TEMPLATES IS UNACCEPTABLE.
by:
Dave C.
11/15/2023
Installation was easy…. Getting to them was the hard part.
Taking down the underbelly was less than fun. Cutting holes in it was even a worse idea.
But, installation went well. Great product, super fast open and close, easy to wire and made my own console for the switches which wasn’t hard either.
Had to put them in different directions due to the main sewer drain being in the way but the auto gate valves do not care which way they go, they work fine either way. Just hope they last as I really don’t like working on my back….
Taking down the underbelly was less than fun. Cutting holes in it was even a worse idea.
But, installation went well. Great product, super fast open and close, easy to wire and made my own console for the switches which wasn’t hard either.
Had to put them in different directions due to the main sewer drain being in the way but the auto gate valves do not care which way they go, they work fine either way. Just hope they last as I really don’t like working on my back….
by:
Jeff
10/26/2025
I am very happy with the Valtera product. Etrailer is typically a very good supplier. But this is the reason for the 3 star average review. First, I think my valves were returns from someone else’s order. Not all of the hardware was included. The mounting screws and the grey tank valve switch plate (as seen in the product photo) missing. I reached out customer service and they sent a lame response saying they do not sell those items separately. OK you missed the point. So at the end of the day I paid about double for the ones I got in 2021 got less, and lame customer service. Hence an average rating, as that pretty much how things are now days. The Valterra valves work great and were easy to install.
by:
Scott
10/28/2025
I decided it was time to install the 12-volt Black Water tank valve. Before doing the install I used RV seal Lubricant and installed it at a 45-degree angle.
It is my opinion that a 45-degree installation will help the life of the valve.
I'm very impressed by the quality build of the unit.
It is my opinion that a 45-degree installation will help the life of the valve.
I'm very impressed by the quality build of the unit.
by:
Tankerman
04/07/2022
Nice valve for remote operation . The wiring is 4 ft from switch to motor/valve, and 3 ft of wire for power. I replaced power wire with a 10 ft piece which was only $9 bucks. Take pic of switch wiring cause you need to remove wires from switch to pass wires through any holes you drill in floor and cabinets, etc . Watch out for water , electric wires when drilling holes. Hole needs to be at least 1/2”for wire ends to pass through. If wood is thick I would do 5/8” hole . Pass big wire ends through first and smaller next. Or cut wire ends off and recrimip new ends after running wires.
by:
Advavance
04/08/2026
Fast shipping and correct part.
Very satisfied!!!
Thank you
Very satisfied!!!
Thank you
by:
Adrien
08/03/2019
I replaced the 2 manual valves with 2 E40A-8’s...one of the best upgrades I’ve done with my Renegade RV.... Easy installation......Great product..... Great price..... Thanks etrailer.... You’re still the best.....
by:
Andy Parish
07/28/2017
Except for having to make some minor modifications to my flanges (they were bowed out between the bolt holes) so the actuators were clearing the flange, the install was easy. The flange issue is not the valve manufacturers fault, just how the flange was made. My old valves were cable style and cheap and these will be a great upgrade on Leaky crappy valves. I was tired of getting the sewer surprise every time I dumped. etrailer delivered on time and at a good value.
by:
Michel
01/28/2018
Every things was in the package , arrive at the time its was schedule .
The installation went very good and easy , to dot it your self if you are manuel its will work find.
I change a existing cable valve with this electric waste valve , the only bad situation was to work under the RV .
The valve work great .
The installation went very good and easy , to dot it your self if you are manuel its will work find.
I change a existing cable valve with this electric waste valve , the only bad situation was to work under the RV .
The valve work great .
by:
Jackson
07/16/2024
it makes it easy for anybody to dump the tank great product
Jackson
7/17/2025
after a year the valve still works great just hit the switch and its done im even thinking about adding them to both of my grey tanks it just makes it easy
Lazer S.
7/18/2025
@Jackson Glad to hear it, Jackson! It's always nice when you find things that make life a little bit easier, especially when you are out on the road and having adventures. Adding it to the grey water tanks is a good idea!
Any more trips planned for the summer?
by:
Karl K
08/12/2019
The Drain Master cam-lock waste water hose is second to none, but after having to use a small allen wrench to manually open/close a failed Drain Master black tank valve, I replaced both with this Valterra assembly. They require a fair amount of space above them to open, but it is much easier to manually operate them, if necessary. They are well-constructed. No leaks, no problems after a year of use, and etrailer offered quick delivery and excellent customer service.
Keep in mind-- the switches are a rocker design that makes open/close positions less obvious, and in bright sun, the red led may be hard to see. I learned this while flushing out my black tank. After I was finished, I reinserted the stopper, thinking the black tank valve was closed. The next time I went to drain the tanks, I took the stopper out, and had a 40 gallon gusher of raw sewage! One thing I can say about all my RV mistakes- I never repeat them!
Keep in mind-- the switches are a rocker design that makes open/close positions less obvious, and in bright sun, the red led may be hard to see. I learned this while flushing out my black tank. After I was finished, I reinserted the stopper, thinking the black tank valve was closed. The next time I went to drain the tanks, I took the stopper out, and had a 40 gallon gusher of raw sewage! One thing I can say about all my RV mistakes- I never repeat them!
Karl K.
8/14/2020
A year later, we are still full-time in the RV. I am using the Valterra valves every couple days and they continue to operate faultlessly.
by:
Robert B.
04/08/2019
This is such a great product,I don't know why it is not an option more often on a rv.I installed the control switch inside my rv near a window that looks out on the sewer connection.I have the clear 3" elbows on both hose ends of my sewer hose,and can observe from inside, the operation of emptying my black tank.Being able to do so during rainy or cold weather is such a great luxury.I have had this in operation for about a year now and it has performed flawlessly.I chose this brand over others due to the ability to manually operate valve in event of a power loss.Installation was very simple and instructions were very detailed.Will never have a rv without one now.
Robert B.
4/9/2020
Still working flawlessly.Been recommending this item to all who inquire about it on my rv.
by:
Ryan
04/10/2022
I bought this item hoping it would fix the issues I had with the factory installed cable, NOPE. This part is no better than the cable system. The clip that hold the valve handle to the electric motor doesn’t clip on correctly, I even tried making it work with zip ties, it worked for maybe two weeks, now I just crawl under the RV and operate it manually. Don’t waste your money.
Jenny N.
4/26/2022
You mentioned that the clip is not holding to the valve handle correctly. I wanted to see if you could send a picture?
Ryan
4/26/2022
Hi thanks for reaching out, unfortunately the valve is in a very hard spot to get a decent photo. I am out of town the rest of the week, I could try to take a photo this weekend if needed.
Jenny N.
4/26/2022
I reached out to the manufacturer who advised that often the handle is not in the correct position and if it is not it will cause problems wit the use of the valve.
by:
Mjh
03/06/2020
I would recommend this product to anyone who has long remote pull drains.
It made both the black and gray water work without a hitch. Just smooth full open to full closed. Well worth the money. Install them myself with the help of my son. They bolted right up no problem.
It made both the black and gray water work without a hitch. Just smooth full open to full closed. Well worth the money. Install them myself with the help of my son. They bolted right up no problem.
Mjh
3/7/2021
Still working great. Should of made this change long ago.
by:
Dennis
06/07/2021
So far a very good valve. I just removed the old cable valve and this slipped right into it's place.
There was one little surprise, the instructions did not indicate which 12v wire was positive. There is a black and white wire. I assumed black was positive, it's not. So of course the valve opened when I connected the wires.
There was one little surprise, the instructions did not indicate which 12v wire was positive. There is a black and white wire. I assumed black was positive, it's not. So of course the valve opened when I connected the wires.
Dennis T.
6/29/2022
After a year of usage the valve is working very well. I really like being able to flip the switch to drain the tank.
by:
Travis
01/22/2026
Appears to be a very nice setup! Looking forward to installing it!!!!
by:
Floyd
12/01/2024
Perfect product.... my 72 yr old dad had the cable black water valve and had trouble pulling it when needed, so, I installed the Valterra EZ valve and put the electric switch inside for him and he loves it, no more outside in the cold or heat to dump the tanks.
Highly recommend this for anyone and was a easy install....
Highly recommend this for anyone and was a easy install....
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See what our Experts say about this Valterra RV Waste Valve
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view full answer... - Can Valterra EZ Valve Electric Waste Valve Be Installed Sideways Under 5th Wheel TrailerYes, the Valterra EZ Valve Electric Waste Valve for RV Black Water Tank # E40B-8 can be oriented sideways so it's able to open up under your trailer. The 3" to 3" hubs mentioned in the description are included with the valve. These are the pipe ends on either side and the hub terminology means that they are the "outer" connection - so your existing pipe will need to fit inside of this at both ends. Since it looks like you have one hub and one spigot (the inner connection) on your setup...
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- How to Choose the Correct Valterra EZ Valve Electric Waste Valve for RV Black Water TankThe difference between a hub connection and a spigot connection is that the hub is the female end and has a lip on the inside that stops the spigot (or male) end where it needs to be. I have attached some pictures to assist. With this knowledge it is just a matter of taking your valve off and choosing the correct replacement: 3" Hub to 3" Hub - # E40B-8 3" Hub to 3" Spigot - # E40-8 3" Spigot to 3" Spigot - # E40A-8 I would avoid going with the option that only has the 3" Diameter #...
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- Grand Design 2600RB Waste Valve ReplacementYou're on the right track here- the Valterra EZ Valve Electric Waste Valve for RV Black Water Tanks # E40-8 is the part you're looking for to put an electric open/close function on your black water tank. Adding in this electric switch for your sewer will allow you to avoid having to crawl under your slide out each time you want to open/close the black water tank- no more pulling the tank handle. You will use the present plumbing and replace your existing cable/handle with the # E40-8;...
view full answer... - What is Shortest Cable Length for RV Sewer Dump ValveThe shortest cable length for the RV dump valves is 36 inches like the part # 34466N4AB36GM you referenced. You can loop the cable to take up the extra slack and it will work fine. The bigger the loop you can make the better as that will allow the cable to slide the easiest. We do have an electric version of this with the part # E40-8 as well.
view full answer... - How Long are the Wires on the Valterra EZ Valve Double Electric Waste Valves Part # E84-8I went out to our warehouse to measure the Valterra EZ Valve Double Electric Waste Valves part # E84-8 for you. The wire lead on the actual valve is about 8-1/2" long whereas the wire lead on the switch is about 7' long for each valve/switch. If you just need the electric valves then we do offer them separately, the Valterra EZ Valve Electric Waste Valve part # E40-8 (3" Hub to 3" Spigot) or the Valterra EZ Valve Electric Waste Valve part # E40A-8 (3" Spigot to 3" Spigot). Unfortunately,...
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- Can the Wires Between the Valve and Switch On the Valterra EZ Valve Electric Waste Valve Be ExtendedThe Valterra EZ Valve Electric Waste Valve part # E40-8 is an excellent option for hassle/mess free dumping. The wire leads on the valve are about 8-1/2" long whereas the wire leads on the switch are about 7' long. If you need more space between the valve and switch then you can certainly extend the wires as needed with some butt connectors. That said, just be sure to cut far enough behind the connector that you still have room to attach the butt connector.
view full answer... - Which Valterra EZ Valve Electric Waste Valve To UseYou linked to the Valterra EZ Valve Electric Waste Valve for RV Black Water Tank, # E40-8 a 3" Hub to 3" Spigot. The difference between a hub connection and a spigot connection is that the hub is the female end and has a lip on the inside that stops the spigot (or male) end. Please note the three options of a 3" Hub to 3" Hub - # E40B-8, 3" Hub to 3" Spigot - # E40-8 or 3" Spigot to 3" Spigot - # E40A-8. I suggest you remove the current component and examine what you have. For installation,...
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- Electric Waste Valve for 4 Inch Diameter Black Water Tubing Are you referring to a waste valve for your black water tank? If this is the case than are you sure you have a 4" diameter tube because the industry standard size for a black water tube is 3" diameter which is what most of our waste valves are designed to work with. We do not have any 4" diameter electric waste valves but you can reduce the 4" diameter black water tube down to a 3" diameter black water tube and use one of the following: Valterra EZ Valve Electric Waste Valve part # E40A-8...
view full answer... - Can The Switch For The Motorized EZ Tank Valve Be Mounted Outside The RVI talked to the install gurus down at the shop. The Valterra EZ Valve Electric Waste Valve for RV Black Water Tank - 3" Hub to 3" Spigot # E40-8 should not be mounted outside in the weather. If you have a storage compartment close to the valve you would need to put the switch inside the compartment to prevent damage to the switch and electrical system.
view full answer... - Can Cable Valves be Open Valterra EZ Valve Electric Waste ValveHi Tony, Yes, with the Valterra EZ Valve Electric Waste Valve for RV Black Water Tank - 3" Hub to 3" Spigot # E40-8 the cable valves be open and relocate the electric valve on exposed sewer line under trailer.
view full answer... - Recommended Electric Dump Valves for 2014 Sanibel 3600 5th Wheel TrailerFor the electric valves, we only have the 3 inch options. We have the hub to hub # E40B-8, the hub to spigot # E40-8, or the spigot to spigot # E40A-8. If you were to convert your 1-1/2 inch to a 3 inch, we do have the double 3 inch electric valves with 3 inch hubs # E85-8 or 3 inch hubs to lug fitting # E84-8. For your slide-out seal, I assume you are referring to weather strip tape like # WS1412 which can be combined with silicone sealants like # 0160297 for extra water protection....
view full answer... - Is there a Specific Place to Get 12 Volt Power to Valterra EZ Valve Electric Waste Valve # E40-8Honestly if it were me installing Valterra EZ Valve Electric Waste Valve # E40-8 I would run a new wire to the battery. If you tap into an existing 12 volt circuit the extra load on that circuit could cause a fuse, or breaker if equipped, to blow. Basically you would have to be sure that the combined power draw of the valve and whatever else may be on that circuit is within the capacity of that circuit. This particular valve pulls 2.5 amps. But as far as any 12 volt circuits that are near...
view full answer... - Wire Gauge for Valterra EZ Valve Electric Waste Valve for RV Black Water Tank, # E40-8The Valterra EZ Valve Electric Waste Valve for RV Black Water Tank, # E40-8 has an 18 gauge wire assembly. We sell wire by the foot if needed, Deka Bonded 3 Wire - 18 Gauge, # DW02923-1. And shrink tubing too, 18-14 Gauge - Black - 1/8" Shrink Diameter - 6" Long, # DW05451 and # DW05452 for red.
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Info for this part was:
Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Joshua S
Installed by:
Kathleen M
Installed by:
Ryan G
Written by:
Amy B
Updated by:
Wilson B
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Charles
1/13/2024
This is an awesome product, ive fitted them on all my tanks and havent failed me yet, i highly recommend this and also easy to install.