Water Tank Doesn't Drain

[MountainSufi]

Howdy from Jackson Hole!

This summer I bought a replacement water pump for my 2017 side table Fleet & had it professionally installed. It has pumped perfectly.

I want to replace water in the tank for fresh. Opening up the drain stop cock valve on a full tank of water results in only a drip coming out (it took multi days to stop dripping). Looking at the brass stop cock valve (replaced several years ago) and "feeling" with a wire shows the ball valve inside rotating the way it's supposed to. IE, the water draining problem is not due a drain valve malfunction. It makes no difference whether the sink handle is open or closed. IE there is no vacuum bubble obstruction. I can't imagine a foreign substance somehow got into my water tank's drain line.

Might this be due to something evolving from water pump replacement? Is there a valve squirreled away somewhere I can't find causing find causing this?

Has anybody ever heard of such a strange thing?

I need water draining properly because 1) It's a handy way to fill water bottles 2) Lines & Tank are not being emptied completely & winter is approaching.

Thankx to all!!!

 

[fish more]

You might try some compressed air thru outside valve to see if clears line, use low pressure !!

 

[veryactivelife]

It seems like either something is blocking the drain line or something is blocking the overflow tube which is how air is going to enter the tank as water comes out. I don't see how it can be related to the water pump. As far as emptying the tank goes, I find the fasted way is to pump it out via the sink.

Dean

 

[MountainSufi]

I'll be trying:

* Emptying cabinets & taking away shielding to see if something is blocking something (which is unlikely).
*I don't have an air compressor, but a bit of low pressure water up the drain stepcock should be a messy equivalent.
*I didn't want to bother my local dealer, but will seek his advice (gawd he's outta town a lot).

Thankx for responding. I'll post when I figure out what's keeping water from running downhill.

 

[bwag]

Probably not the issue but I know on my camper with the valve installed at the factory, if I turn it too far to the drain side, it won't drain I have to turn it back the other way a bit and then it does, basically mine can be turned so far over it allows the drain hole to close again.

 

[MountainSufi]

SOLVED!!!

I bought a brass female to female water hose coupling.
Filled up my water tank. Opened the sink faucet for good luck not blowing out connections. Connected the female-female to my water hose and screwed that into the water storage drain stopcock.
Crossed my apprehensive fingers & turned on the water hose at low pressure.
VOILA!!!!
Almost instantly the overfill relief screen was gushing out water! The drain valve stepcock has an outflow of water when opened.

I wanted to fix this for two reasons:
1) I want to be able to reliably drain 100% of fresh water during Jackson Hole winters.
2) When the crappily built FWC water pump dies on a trip, your source of water will be that drain stepcock.

Thankew tribe for your support!