This sounds likely - My usual fix for fixing the prime in the water pump in the spring was to bring a hose on board and blast water into the tank drain, up to the faucet - this would also blast over to the other tank, and likely blow out whatever crud was in the line. Then vacuum out that tank and clean.
Bill Coleman Entrada, Erie, PA Something is preventing the free flow of water from one of the tanks. It could be; - a clog in the hose from the tank to the tee, - maybe a valve, somewhere in that line that is closed, - it could be the vent is plugged solid, creating a vacuum. Which does not allow the water to flow. Given that there is very little head pressure to overcome the vacuum, it wouldn't necessarily take too much of a plug on either side to stop the water flow. Danny ---------- Original Message ---------- From: Rick Brass via CnC-List <cnc-list@cnc-list.com> To: "'Stus-List'" <cnc-list@cnc-list.com> Cc: Rick Brass <rickbr...@earthlink.net> Subject: Stus-List Re: water tanks interconnected, or not? Date: Tue, 23 Mar 2021 23:37:40 -0400 My 38 also has a tank under the port and starboard settees. Each of the tanks has a shutoff valve at the outlet. The two drain hoses meet at a T under the floorboards, and from this T is the line to the pressure pump. Curiously, there is also a shutoff valve on each side of the T. I could see no good purpose for the second shutoff in each supply line (unless it was there to stop all the water from leaking out through a broken line), so I left them in place when I replaced the hoses a while back. Maybe you have an arrangement like this one? Rick Brass Washington, NC From: Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com] Sent: Monday, March 22, 2021 7:14 AM To: Stus-List <cnc-list@cnc-list.com> Cc: petemcm...@gmail.com; Adam Hayden <hayden.a...@hotmail.com> Subject: Stus-List Re: water tanks interconnected, or not? Peter Very interesting. I have the same issue except my port tank drains and the Starboard tank does not. Drives me crazy. Adam c&c 36 Sent from my Bell Samsung device over Canada's largest network. _____ From: Peter McMinn via CnC-List <cnc-list@cnc-list.com> Sent: Monday, March 22, 2021 3:55:08 AM To: cnc-list@cnc-list.com <cnc-list@cnc-list.com> Cc: petemcm...@gmail.com <petemcm...@gmail.com> Subject: Stus-List water tanks interconnected, or not? I have a 30gal water tank under both settees. The valves for each are set to open flow. However, the pump seems to draw only from the starboard side. I'd assumed that with both valves open, the tanks would equalize, but the stbd tank empties and the pump goes dry, while the port tank remains full. Can someone venture to what's going on? I've read this 2015 discussion <https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=S LQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F> , but the OP then was interested in disconnecting the two tanks. I'll do some exploring tomorrow to see what might be preventing the tanks from equalizing. Ideas are welcome.
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