1. RV Waste Valves
  2. Valterra
  3. Double Waste Valve - Manual
  4. Sanitation Tee
  5. 1-1/2 In Hub
  6. 3 In Hub
Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Hub

Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Hub

Item # T18
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RV sanitation tee combines rotating black-water and gray-water waste valves. 3" Hub slides over black-water line. 1-1/2" Hub slides over gray-water line. Bayonet cap fits over 3" lug fitting that connects to your sewer hose. Lowest Prices for the best rv waste valves from Valterra. Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Hub part number T18 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (34)
  • Q & A (4)
  • Videos (1)
  • Photos
  • Why etrailer?

Valterra RV Waste Valves - T18

  • Double Waste Valve - Manual
  • Sanitation Tee
  • 1-1/2 In Hub
  • Valterra
  • 3 In Hub
  • Rotating Valve

RV sanitation tee combines rotating black-water and gray-water waste valves. 3" Hub slides over black-water line. 1-1/2" Hub slides over gray-water line. Bayonet cap fits over 3" lug fitting that connects to your sewer hose.


  • RV sanitation tee combines a 1-1/2" waste valve and a 3" waste valve
    • Can be used as a replacement part or to upgrade your existing setup
  • T-configuration merges the flow of waste from your black-water and gray-water tanks
    • Valves are perpendicular to each other
  • Rotating valves offer easy access at mounting location
    • Position each valve at desired angle during installation
  • 3" Hub slides over your RV's black-water line
  • 1-1/2" Hub slides over your gray-water line
  • 3" Lug fitting allows you to connect to bayonet fitting on sewer hose
  • Bayonet-style cap covers lug fitting when not in use
    • Integrated strap keeps cap connected to valves
  • Durable black ABS plastic construction
  • ABS solvent cement (sold separately) required for installation
  • Gray and black handles for easy identification of valves
  • 1-Year warranty

Valterra sanitation tee in use

This RV sanitation tee with double rotating valves is a part of your motor home's waste management system. The T-configuration combines the flow of wastewater from your gray-water tank and your black-water tank. And the valves can be rotated as desired during setup to make it easier to reach them. Connect your sewer hose to the 3" lug fitting on the sanitation tee and open the valves to drain your holding tanks.

T84 Valterra Motorhome Sewer Elbow w/ Double Rotating Valves - 3" Hub x 3" Hub x 3" Bayonet Cap

Video of Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Hub

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

Video Transcript for Valterra RV Sewer - Waste Valves - T18 Review

Today we're going to take a look at the Valterra RV Sanitation Tee with the double rotating valves. This is made of a durable hard plastic construction. It is designed for a black water and a grey water connection. They call it a Sanitation Tee. The Tee design is how the tubing runs, you can see this way and that way. It does have a 3-inch bayonet end right here, and this is designed for use with the included bayonet cap that's attached, or it can be connected to a drain hose with a bayonet fitting. The bayonet fitting basically means, you can see it has the 4 pins right here, and on either the cap or the hose that you attach will either have 2 hooks or 4 hooks.

What you do is just put it over there, and then when you twist it, you'll notice that those hooks grab those pins and hold it in place, give you a nice secure connection. The 3-inch waste valve body right here is a Bladex design. It's used to open or close the tube opening. If you notice here, when I pull up on the handle it'll open it, push down, it'll close it. This is on the black water end. Now I'll have a 1.5-inch, on this end you can see, there's a 1.5-inch waste valve body also.

It is a Bladex design, it's used to open or close the tube opening on the grey water end. You can see, open it or close it. Both of those can be rotated, that's why they call this a double rotating valve. Basically what that means is when you go to hook up your tubing and your tubing hooks up in a way to where maybe one of these valve handles is in a location that you can't access, what you can do on either one of these is remove the nuts and bolts. When you do that, you can rotate that handle 90 degrees in different positions to where you can make that handle very easy to access.

They are rotating, you can rotate them. Now both valve bodies have metal valve shafts, you can see when we open them. There's the metal valve shafts, they do have plastic handles on each end. I do want to give you a few internal dimensions. We'll start on the black water end. The internal dimension right here is 3.5 inches.

Now on the bayonet end, go ahead and twist the cap off, and the internal dimension on that is going to be right at 3 inches. Go ahead and put the cap back on. Then on the grey water end, the inside internal dimension is going to be right at 1 and 15/16. That should do it for the review on the Valterra RV Sanitation Tee with the double rotating valve.

Customer Reviews

Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Hub - T18

Average Customer Rating:  4.9 out of 5 stars   (34 Customer Reviews)

RV sanitation tee combines rotating black-water and gray-water waste valves. 3" Hub slides over black-water line. 1-1/2" Hub slides over gray-water line. Bayonet cap fits over 3" lug fitting that connects to your sewer hose.

- T18

My 2013 27/20 Trailmanor camper had separate discharges for gray water and sewage and I bought this to combine both discharges. It works fine as it has in previous TrailManor models prior to them going to separate discharges.

No problems at all, valve works very well
Steppy - 04/05/2020

- T18

was able to help my customer when it came in

- T18

You guys did a wonderful job !! From your easy website to the outstanding young lady I talked with about my order. WOW !!!! the order was exactly perfect and in the time frame it was promised.. great job!! Thanks

- T18

Heavy duty valves, it is a Valterra product. I’ve installed every kind of waste valves made and now we use Valterra exclusively.

- T18

My previous valve assembly was damaged when the temperature at Elk camp dropped below 20 degrees. This new valve bolted right on and stopped the dripping that was happening. The best part is that it survived the 2020 Elk camp!

- T18

Not quite what I was expecting based on the photos (1-1/2" inlet attached to 3" drain fitting slightly different than the old part) but it bolted up just fine, and as an added bonus the black tank 3" valve does not appear to leak like my old one did right from the factory.

- T18

Product works as intended, easy installation. If you are mounting on an older camper, beware that the manufacturer used steel bolts that rust. you don't want to snap off the plastic valve flange when installing. Other than that, product works beautifully.

Excellent. I would agree with George Jthe original bolts can be a problem if they are rusted mostly likely they aresome may need to be hacksawed off, so be careful. If you can get the old off cleanly, its a perfect fit as far as assembly and installation.
Steve Y - 06/15/2020

- T18

Did a replacement of my grey and black water stopper valves. The seal of the black tank started leaking. So I purchased the new one came fairly quick. It was easy to replace doing all the work myself. Only taking up one afternoon of my time. I’m liking the ease of operation. I’m very happy with it’s turn out. Thanks

- T18

Had a blowout that wiped out the grey/black dump valves, along with a lot of other damage. This is a simple direct replacement for the 10 year old OEM installed valves. Saved lots of time & money. The rep at e/trailer (angela k.) was awesome to work with.

- T18

This was shipped very quickly, and the price was great. Comes with both the large and small "input side" flanges, which I didn't actually need because it was a replacement for an existing valve set, but then you get all the new screws and gaskets too. Simple to replace my existing valves, where were cracked and leaking from road abuse. Thanks etrailer!

- T18

The product was great. Even though I don't know about plumbing the description and video tell you the measurements. But I didn't realize the 3" pvc pipe for fit directly into it. And I needed a 2" coupler for the 1 1/2 side. But once I figured that out it was quick repair for my vintage trailer.

- T18

Good product and good pricing. Staff was responsive and respecful. I will be using ETrailer again. Product is made well.

- T18

Exactly as described and pictured. Quick shipping was GREAT !! Thank you.

- T18

I am extremely pleased with the waste value i ordered from etrailer. It arrived on scheduled delivery date. For some reason UPS transferred the package to my local USPS instead of delivering it themselves, so I did have to pick it up since it was to large for our mailbox.

- T18

This thing still works great after a year of use. It was easy to install and the slides are still smooth and easy to use. Thanks for a great, reasonably priced product.

- T18

The dual valve is exactly what I needed. It is identical to the OEM valve that came with my RV. I am very pleased with the overall quality and the speed with which the part was shipped to me!

- T18

This is a fantastic valve. It fit perfect. no modifications.

- T18

Excellent product, worked very well.

- T18

The product works correctly.

- T18

Excellent quality, fit great works perf ect.

- T18

Product was as advertised and an exact replacement

- T18

Just what we needed to fix our leaky pi pe

- T18

have not had a chance to install yet. however looks good as a replacement.

- T18

This service valve is exactly what I needed. The price was right. Service was excellent.

- T18

Very good received it quickly and it fit perfectly. Would highly recommend.

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Amy B
Written by:
Amy B

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