Forum Discussion
dougrainer
Sep 07, 2018Nomad
CarArt wrote:
I've seen a guy advertise he'd comes out with a 4000 psi pump and essentially does the same thing. Similar to my idea using brut force vs water pressure build up
4000 PSI???????????? IF anybody has this done, have a Video Camera ready. The explosion would be worth seeing. In 40 years as a Tech, I thought I had seen or heard all the Hair Brain ideas.
1. There is something that was in the tank from build(hole cut out plug) that has finally migrated and blocked the exit fitting at the tank side of valve, BUT, that usually does NOT block off all water. It would still seep slightly.
2. The knife valve has broken loose from the rod or cable and stays shut. MOST PROBABLE CAUSE
3. There is NOTHING you can do from the inside at any of the sinks or shower. The plumbing will not react well to forcing from the inside and you will cause MORE problems than you have now
4. Running a snake back up thru from the outside on a 1.5 inch valve and possibly a 1.5 inch ABS pipe is almost impossible because of the various elbows involved
5. The BEST way is to just remove the valve and let the tank then drain. I know, on the ground.
6. IF there is some type blockage on the backside of the valve, the only sure fix is to remove the valve anyway. Forcing the debris backward will just cause the problem to come back later.
7. Since the RV is 10 years old, I would say there is NO construction debris causing your problem. Doug
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