Black tank dump valve replacement tips?

[PNW_Steve]

Hey Everyone,

I am having trouble with the dump valve on my black tank leaking. Just a slow leak.
I dumped and rinsed then added some "seal conditioner" that I found at an RV shop.

That appeared to resolve the issue for a few days. Now it has started leaking again. I am thinking that replacement is the best solution. If I am able to find the parts here in San Carlos I am going to tackle the replacement.

Do any of you have any tips or suggestions for making this easier or less offensive?

Any volunteers to show me how it should be done 🙂 ?

Thanks

Steve

[John_Wayne]

Some have mentioned to use thin metal sheets on each side of the new valve when sliding it between the fittings to keep the seals in place when you slide the new valve in. Line every thing up pull the metal sheets out insert bolts and nuts and done.

[PNW_Steve]

Artum Snowbird wrote:
And after holding the drain open when the rig is sloped to drain into a bucket, then turn the rig around so that the drain valve is higher than the tank.

Great tip!

I think I can accomplish the same by raising and lowering the landing gear.

Thank you.

[PNW_Steve]

parkdep wrote:
This is a real easy fix.Twist-on-Repair Waste Valve

I am parked with full hookups. Gray valve is open. Black valve is closed. Not sure how that would play....

[John_Joey]

PNW_Steve wrote:
...Do any of you have any tips or suggestions for making this easier or less offensive?

Have DW do it.

[Dave_H_M]

best place I found to get the valteras was amazon

if you do that twist on thingy. you will have a huge pop cycle in the pipe if it freezes

a lot of people includig me cut a service hoe in ghe underbelly for the change out.

[j-d]

I like that Valterra Twist-On Repair Valve linked above. Even when the system is working well, or we think it is, could be nice to have a backstop. Anything to prevent the "Hydraulic Surprise..."

[cochise49]

Or this.....

https://www.youtube.com/watch?v=D0iLd2CnyKI

[ernie1]

Do not use any plumbers grease or any other grease that is a petroleum product. I've found some plumbers grease has a petroleum base and some have a silicone base. Use silicone based grease only. Petroleum greases will, in the long run, swell the seals and make them very hard to operate. In my case, it was so hard to operate the blade valve that the seals popped loose and "stuff" came out onto the parking lot at a Kmart.

[parkdep]

This is a real easy fix.Twist-on-Repair Waste Valve

[Dick_B]

Replace with Valterra.

[HappyKayakers]

I've had a few slow leaks from the black tank. Never replaced the valve, just did a very good fill/flush the next time. After refilling the tank with fresh water, I open the valve slightly. The increased flow pressure going past the valve seat usually pulls whatever TP was stuck there so it can seat properly.

[pugslyyy]

The good news is that changing the valve is a pretty easy task. Getting access to the valve may be a bit more tricky (I have to drop underbelly panels to get at mine).

Do a good leak check before you put everything back together.

[donn0128]

Just did mine for other reasons. Had to drop the underbelly. The rest is pretty simple. 4 bolts and nuts hold the valve together. Remove them, and open the gap between the two halves. Slip the old blade and gaskets out. Using lots of plumbers grease, grease up the new parts. Slip the new blade with gaskets in place. Install bolts and snug down. Do not over or under tighten or you will have a leak. Test by adding water to the tank. Yes it is a crappy job. Be sure to use disposable rubber gloves.

[Artum_Snowbird]

And after holding the drain open when the rig is sloped to drain into a bucket, then turn the rig around so that the drain valve is higher than the tank.