Gray tank fitting

Question

I installed a new gray tank in the tt Im rebuilding. I have the original plumbing and gates valves but the plastic is very old and brittle and Id like to replace it. What I cant find is the section of 3.5" pipe that slides into the tank. The one I have has an o-ring and groove for it on the outside of pipe. Slide that in and clamp it with a hose clamp. Does anyone know where I can find this piece of pipe with an o-ring? I have looked through pages and pages of RV sewer fittings with no luck. Perhaps Im not searching for the right thing. Thanks!

cyntdon2010 · Answer

Post a photo of the pipe. Someone should be able to help quicker

teardrop55 · Answer

Here you go

path1 · Answer

Not exactly sure if this will help or not...But years ago a had to re-do my drains on an older TT. I used one of these fittings. Worked out fine. I picked up at local hardware store. Clamps never came loose. I also put some putty tape around it.

https://www.amazon.com/dp/B000BQKD96/ref=asc_df_B000BQKD964875150/?tag=hyprod-20&creative=394997&creativeASIN=B000BQKD96&linkCode=df0&hvadid=167126276842&hvpos=1o3&hvnetw=g&hvrand=15192978567046032060&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9051666&hvtargid=pla-275328510701

teardrop55 · Answer

Thanks, I thought about doing that and have one of those couplers. The problem is the flange coming out of tank is so thin and short I wouldnt be able to clamp it very hard without collapsing the tank outlet or causing that coupler to squish/slide off the outlet. If I do have to go that route I will stick a piece of rigid pipe inside the outlet to provide the structure so I can get a good tight clamping between the tank and coupler.

path1 · Answer

Op... I was typing same time you were posting. Upon seeing your pic's check out links at

http://www.valterra.com/product-category/rv-products/aftermarket/sewer-sanitation/

What yo need might be under different name, also check out "FLANGED VALVE FITTINGS" see example pic's at

https://www.google.com/search?q=rv+flanged+fittings&biw=1301&bih=589&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiFpZW9kcDSAhUI82MKHd66CMEQ_AUIBygC

If worse come to worse you might have to put in a bulkhead fitting. To do that you'll have to drop tank and install a access porthole if you can't reach with your arm. Basically drill a big hole so you can get arm and wrench inside tank to tighten bulkhead fitting and then install cover for access hole you drilled.

https://www.amazon.com/JR-Products-31025-White-Access/dp/B004RCSKZE

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Gray tank fitting

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