Tank tender

[phorvati]

Anyone know if tank tender valves can be repaired or how they work? On my system Only tank 1 worked. I ran new tubing for tank 2 because tubing had kinks in it. Unfortunately I realized valves are leaking. When I plugged tank 2 tubing into tank 1, gauge worked. I managed to take all the valves out, but cannot really assess good one from the bad. At the moment I managed to find two valves that work okay. But I still have a small leak, very small so it's usable.

[Psy at SEA]

Contact Lisa at thetanktender.com
She will give you the best recommendations

[phorvati]

So i narrowed down some of my issues. 2 valves are definitely leaking. Valve itself is pretty customized and might be tough to source. 60-70$ is likely the hit for that.

But tnak tender system uses 1/8" OD push to connect to threaded female adapter at each end. this also appears to be customized. Mcmaster has 1/8" OD tube to 1/8" NPTmale for few bucks. i am almost tempted to source mcmaster first before dishing out the $$$. just need to confirm the thread.

[belizesailor]

Ive partially torn down Tank Tender valves to clean/lube them and gotten them working again. Dont recall in detail, but wasnt complicted. Either way its quality gear thats well worth fixing even if you spring for new valves.

[phorvati]

I figured out the principle of selector/push button valve and how it contributes to small(partial) leak. In a pushed state it selects only that particular tank and pumping pressurizes only that particular tank so you get a Inches reading. But in de-pressed state which is its normal resting state, its suppose to act as a pass-through for the air pressure circuit of another selected "down-stream" valve. However it can leak in this resting state and it then affects the reading in the "down-stream" selector valves. Then multiple leaky valves can compound the reading leakage on all downstream valves.

So it turns out all 6 of my valves do not leak in pressed state where they select their own circuit. I found this out by taking each one of them and using them as the first valve and testing on a known good tank/tubing. But 3 out of 6 leak in the resting state and cannot act a pass-though. That's such a bummer.
I guess I'll call Lisa to see if i can get a new one. If i could somehow figure out how to take the stem fitting out it would help. They seem to be manufactured in-house and therefore impossible to source elsewhere.