cursethebanksters
New Member
Hello,
I have a Flojet demand pump model 0356 144a in my travel trailer. I have had it a couple months and it just doesn't work right. Here is a link to it:
http://www.amazon.com/Flojet-03526-144A-Diaphragm-Automatic/dp/B002P33KVQ
First, I have to manually turn it on and off with a switch because it usually doesn't shut off like it's supposed to. I think because it still has air in the lines. Sometimes it does shut off though.
Second, it seems to lose it's prime in between uses and gets air into the lines which has to be blown out every time I turn it on. I'm pretty sure it has a check valve built in.
The inlet line runs from a storage tank that has a 3/4" pvc which adapts to 3/4" poly which then goes into a garden valve hooked up to 3/4" pvc, which then runs to the inlet to the travel trailer which is a 1/2" pex. I imagine all of these transitions cannot be good and perhaps I'm getting air in somewhere on suction side. All except the poly pipe was hooked up when I bought the trailer. The pump is spliced into the pex supply line and I didn't have a pex crimper so I'm just using hose clamps to attach it to the pump fittings on both sides.
Also, the tank is outside on the ground and the pump has to lift the water about 4 feet if the water is low, then the lines drops down to the ground and the pump is mounted inside about 4 feet from ground level. Is this amount of lift causing a problem? The pump is rated for 9 feet of suction lift.
Maybe I am getting air sucked in somewhere. There is no water leakage at all that I can find though. Someone mentioned something about possible cavitation but I am unaware of what would cause that.
I am thinking I will replace the supply line from the pump all the way to the tank with 3/4" poly, except the tank drop pipe, and go from there. This would get rid of the pex and all of the different pipe transitions.
Thanks in advance for any feedback!
I have a Flojet demand pump model 0356 144a in my travel trailer. I have had it a couple months and it just doesn't work right. Here is a link to it:
http://www.amazon.com/Flojet-03526-144A-Diaphragm-Automatic/dp/B002P33KVQ
First, I have to manually turn it on and off with a switch because it usually doesn't shut off like it's supposed to. I think because it still has air in the lines. Sometimes it does shut off though.
Second, it seems to lose it's prime in between uses and gets air into the lines which has to be blown out every time I turn it on. I'm pretty sure it has a check valve built in.
The inlet line runs from a storage tank that has a 3/4" pvc which adapts to 3/4" poly which then goes into a garden valve hooked up to 3/4" pvc, which then runs to the inlet to the travel trailer which is a 1/2" pex. I imagine all of these transitions cannot be good and perhaps I'm getting air in somewhere on suction side. All except the poly pipe was hooked up when I bought the trailer. The pump is spliced into the pex supply line and I didn't have a pex crimper so I'm just using hose clamps to attach it to the pump fittings on both sides.
Also, the tank is outside on the ground and the pump has to lift the water about 4 feet if the water is low, then the lines drops down to the ground and the pump is mounted inside about 4 feet from ground level. Is this amount of lift causing a problem? The pump is rated for 9 feet of suction lift.
Maybe I am getting air sucked in somewhere. There is no water leakage at all that I can find though. Someone mentioned something about possible cavitation but I am unaware of what would cause that.
I am thinking I will replace the supply line from the pump all the way to the tank with 3/4" poly, except the tank drop pipe, and go from there. This would get rid of the pex and all of the different pipe transitions.
Thanks in advance for any feedback!