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

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

Item # T18C
Our Price: $76.58
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RV Waste Valves
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Shipping Weight: 2 lbs
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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" Spigot slides into gray-water line. Bayonet cap fits over 3" lug fitting that connects to your sewer hose. Great Prices for the best rv waste valves from Valterra. Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Spigot part number T18C can be ordered online at or call 1-636-306-4830 for expert service.
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Valterra RV Waste Valves - T18C

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

RV sanitation tee combines rotating black-water and gray-water waste valves. 3" Hub slides over black-water line. 1-1/2" Spigot slides into 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" Spigot slides into 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 dimensions

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.

T18C Valterra Motorhome San Tee w/ Double Rotating Valves - 3" Hub x 1-1/2" Spigot x 3" Bayonet Cap

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

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 - T18C Review

Today we're going to be taking a look at the Valterra RV Sanitation T with double rotating valves. This unit can be used as a replacement or it can be added to your RV sewer system. It's designed to combine your black water and gray water tank drainage tubes to one outlet. The black water and gray water tank tubes still have their own gate for controlling drainage. Each valve is designed to rotate, which gives you easy accessibility, so that's simply what we mean is that each one can rotate back and forth. Really nice design of the unit. I do want to point out that one's going to have a gray handle, the other one's going to have a black handle, that's going to distinguish which one is for the black tank, and which one is for the gray tank.

Gray goes with gray, black goes with black. It's going to come with the end cap right here for the main drain tube. This is going to be tethered on there, so you don't have to worry about losing that or misplacing it. When you're ready to connect your drainage hose this hub is designed to work with a standard 3" diameter hose with a bayonet style fitting. Then you can see there, this is going to be the gate for the black water, and then this is going to be the gate for your gray water tank. Really nice design.

Cap easily connects. Nice strong, durable construction. When it comes to the connection points for the tubing, right here for the black water tank this is going to accept a standard 3" plumbing pipe. If we take an internal measurement of that you can see that's going to be 3 1/2", so your standard pipe on your RV is going to have an internal diameter of 3". It's going to be a 1/4" wall, so you're going to have 1/4" on each side, which combines for a total of 3 1/2", which would fit perfectly inside of this connection point.

The spigot right here for the gray water tank tube is going accept a standard 1 1/2" diameter pipe, that's going to be the internal measurement right there. That's going to do it for today's look at the Valterra RV Sanitation T, with the double rotating valves.

Customer Satisfaction Score:

Customer Reviews

Double RV Waste Valves - Sanitation Tee - Rotating - 3" Hub and 1-1/2" Spigot - T18C

Average Customer Rating:  4.8 out of 5 stars   (29 Customer Reviews)

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

by: 07/06/2022

The shipping was as promised, with the correct item. We actually lived in our camper for awhile this year during a home remodel so its gotten some heavy usage and is holding up well so far.


Everything i needed to fix my waste val ve


I just received the product today and at first glance it looks to be exactly what I need. I went to Home Depot and bought ABS pipe and ABS pipe glue, along with other connectors required for the gray water line, and hope to cut the ABS line to fit and complete the assembly and repair in the next few days. The product was purchased because my rear tire on my RV blew off its tread while driving, and the force of the tread splitting off knocked off my previous RV holding tank valve assembly and dropped it somewhere on the highway! Here is a photo after the original valve assembly broke off! Travel on!


I put this on a 1980 trailer. It almost went right in. I had to extend the gray water inlet to fit up with the original mount location. It is very handy that this assembly pivots so I could easily align the discharge line from the gray water to the valve. I then just added a section of PVC to make up the short fall. I am very pleased with this manifold, valve assembly. It came complete with the gaskets.


My etrailer buying experience was absolutely top shelf. From the moment I landed on the site I knew I was in good hands. I couldn't find exactly what I was looking for and when I called in, they spent a lot of time with me helping to locate the correct part. When I ordered the communication was excellent, in fact they shipped it quicker than expected. I ordered regular shipping and they upgraded me to express at no extra cost. I highly recommend etrailer and will absolutely be purchasing from them in the future.


Product was delivered as ordered. It was the part I needed and came in good packaging. It was easy to track the shipment as it came across country. This part will go into a trailer we are rehabing.


We rent rvs and we had a customer break off the old drain pipe connection. Thought it would be harder to find but etrailers had this peice that was an exact fit! Great part, great fit, great results! Thanks etrailers!!


Exactly what we needed, and etrailer had it. No one else did. Had it to us in record time. Got our customer finished and on his way before Christmas! Love having etrailer on our team!


I was pleased to see so many RV products available through this site. The part that I ordered was exactly what I needed to replace on our motorhome. Quick shipping was also a plus. Thanks!


This Product T18C worked great. I was able to change out my old Septic fitting and remove my Gray water outlet and combine it into this fitting and now I have one Septic outlet for my camper.
I highly recommend this product.


I just received the product. It’s exactly what was advertised. Great product for the money. It is going to be a great replacement part for my travel trailer.


Took some adjustment to hanger straps, but the Manifold was a great replacement fit.


Worked like a champ


Great quality. It's been one year and have no issues.


Excellence parts, fit perfectly.


Part fit perfectly, great service



Great product and friendly staff, would highly recommend.Thanks Tammie in customer service.


Worked out great Fast ship.... These guys got the stuff together


Glad I was able to find the exact piece I needed.




Just like my old one, quick deliver.



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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Amy B
Written by:
Amy B
Employee Cody B
Updated by:
Cody B

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