Connecting Garden Hose to Black Tank Flush Connection

[BM Welder]

The black tank fitting on the trailer can go bad I've had to replace mine.

[Johntgif]

Turn the black tank hose on at a low pressure and closely inspect the TT plastic fitting for possible cracks. I had to replace my city water fitting for same problem, Three screws and threaded fitting inside the TT wall. Took longer to clean the old RTV sealer off than it took to replace the plastic fitting. Fittings are cheap on EBay, etc..

Happy Camping!!!!

[ArkRVHog]

Wow...as the OP I really thank everyone who took the time to provide their valued input. I pretty much tried everything in the last couple of days so I replaced the fitting (even one with a brass backflow connection) and my existing hose threads on tightly and perfectly now.

I guess I have to chalk this one up to the great RV world of the unknown. (At least it was just a $25.00 part and easy to install.) Thanks again to all!

[mds47588]

Originally Posted by emm-dee

Put quick connect fittings on the hose and the flush fitting. Takes about two seconds to hook up using one hand.

Every hose that I have has a qwik connect (metal Wally World version) with a plastic shutoff valve attached and would never consider screwing another hose now.

It’s also easy to lay out the city water hose, close the shutoff, and then turn the water on. Then open up the shutoff valve until it’s steady water with no air, **** it off, qwik connect it to the RV, and then open it back up. No more spitting water/air out of the faucets and no tuning back and forth between the water faucet at the campground and the hose end.

[Larry-NC]

Originally Posted by mds47588

Every hose that I have has a qwik connect (metal Wally World version) with a plastic shutoff valve attached and would never consider screwing another hose now.

It’s also easy to lay out the city water hose, close the shutoff, and then turn the water on. Then open up the shutoff valve until it’s steady water with no air, **** it off, qwik connect it to the RV, and then open it back up. No more spitting water/air out of the faucets and no tuning back and forth between the water faucet at the campground and the hose end.

I've had several sets of the brass ones from Harbor Freight. They work great--for a year. Then the internal seal (which looks like no other seal you've ever seen-- goes bad and they leak. It's left me with a long-standing distrust for brass quick-release fittings. The plastic ones on my pressure washers use standard, easily replaceable o-rings, a better solution.

If you live where it freezes, be sure to take the quick-releases off your taps AND hoses to avoid damage.

[Mandog]

Hi,

If the male end is fitting all the way up inside the female on your RV then I’d suspect the female to be cracked. It’s black and hard to see a crack. Use a good flash light and look at the female fitting closely.

[jim454]

my hose did the same thing, the inlet was all plastic and the hose would link, i replaced with a brass insert inlet from Amazon, now i don't have any problems.

[Freetyme]

The brass 90° is a wise suggestion. A little less stress from the weight of the hose. Missing washer, short threaded male end on hose, cross threading damage, or cracked female connection on the rv. All possible causes.