Go BottomPriming a Water Pump - Need Help
 | Tracey McCormick
Join Date: Posts: 1 
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1999-08-18 7033
I realize that this has nothing to do with compacts, but I'm sure someone here can help. We just purchased a 500G water trailer for dust control at our stable. It comes with a MultiQuip 2" Trash Pump (powered by a 5.5 HP Honda). The pump is used to both draw water from a well to fill the trailer and also to provide pressure while spraying when towed behind our JD4300 (had to get the tractor mention in there somehow). My question is this: There is about 80' of lateral hose run (about 15 feet vertical "head") for the hose from the well to the pump. How do I go about priming this line, it seems like the pump can not "self prime" and without first filling the line with water, the pump does not seem able to generate enough suction while pumping the initial air. Am I right in assuming that I have to fill the line with water so that the whole suction line is primed? If this is correct, does anybody have an easy way to do this?Thanks in advance for any help from any of you well owners out there.
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| Ron Brenton
Join Date: Posts: 1
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1999-08-18 7041
Tracy.We have a 2" MultiQuip pump also. First step would be to take the pump housing off the pump to check the flapper valve located on the pumps suction connection and the housing and impeller for any debris that might effect pumping. A bad Flapper valve will allow any priming that you do to the pump, to leak out into the suction hose. I assume that the suction hose has a foot valve on it if you can fill the hose. Try elevating the discharge hose slightly, to stop the pump from discharging its prime too easily.Good LuckRon from Conn. ....
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Add PhotoPriming a Water Pump - Need Help
| Roger L.
Join Date: Jun 1999 Posts: 0
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1999-08-18 7047
Tracey, most pumps will push much better than they will pull water. Before you go tearing into the pump, check if youare asking too much of the suction side. Any pump ( and yours is a good one) can only pull a combined suction composed of the vertical height plus the resistance in the hose equalto the ability of the atmoshere to push the wateron up to the pump. Priming speeds things up, but won't affect the end result. . This is a limitation imposed by physics, and applies equally to every type of pump. If you look where most pumpsare used, they get the pump as close to the water source as possible. Putting the pump in a pit is used a lot. Try pushingthe water through the 80 feet of hose rather than pulling it. I've designed several pumping systems and can help you with yours. If this is not interesting to the compact tractor group we can take it offline... Roger ....
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Add PhotoPriming a Water Pump - Need Help
| mike
Join Date: Posts: 1
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1999-08-18 7069
Tracey, The horse farm I used to worked at had a simular set-up. I would take the garden hose from the house and fill the entire section of pipe. then start the pump. The prime got it going every time perfectly. It was a hassle to drag the house-water hose over to fill the pump hose but priming the entire section got it going quickly. ....
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