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Old 03-30-2018, 10:15 AM   #1
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Water drains question

Under my 26 TBSS I have 2 plastic drain lines. One has a valve and is used to drain the fresh water tank. The second has no valve and occasionally drains water. What is this drain for and what tank does it hook up to? Is occasional draining an indication of a problem?
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Old 03-30-2018, 10:20 AM   #2
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The one with the valve is the FW tank drain and the one without the valve is the FW tank overflow/vent. If you are on city water and not using the FW tank when you have the dripping, it is possible that the back flow valve in the pump is not properly seated and is allowing water to trickle into the FW tank and filling it so it overflows. If this is the case do the following

Turn off city water'
Turn on any faucet and allow to run until there is no flow.
Turn off faucet.
Turn on water pump and open faucet and let it run for 30 sec.
Shut off water and allow pump to run until it stops on its own
turn off water pump
turn on city water.
You should be good to go as this should reseat the back flow valve in the pump
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Old 03-30-2018, 05:53 PM   #3
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its nothing but an over flow line. when your fresh tank is full it runs out there. nothing needed to do. Some folks have problems with that siphoning their tank empty. if that happends you need to add a cap to stop the siphon effect
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Old 03-30-2018, 06:23 PM   #4
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Quote:
Originally Posted by Kimber45 View Post
its nothing but an over flow line. when your fresh tank is full it runs out there. nothing needed to do. Some folks have problems with that siphoning their tank empty. if that happends you need to add a cap to stop the siphon effect
Actually it's the vent line for the holding tank and acts as an over flow indicator. If a shutoff valve is installed it needs to be open when using the water pump.
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