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 Welcome Dave. I'm not to sure, but I think you picked the right one.

Demand pumps are controlled by a built in pressure sensing demand switch. These pumps require a balanced flow, too small of a nozzle may restrict the flow, resulting in the Demand Pump shutting off. Bypass Pumps can be used in applications which would result in frequent stopping and starting of the motor. Pump models with an internal bypass are designed to pump at a higher pressure with low flow rates.

mrgreenclean wrote:

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So Joe,do you think i made the right choice in buying the demand type pump?

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You picked the correct one do you know if the 5850 is a 3 or 5 gallon per minute pump?

on demand is best, 2nd most is viton seals. Equally important. Alot of this you cand find in search. Then there is GPM. There all about the same, 60 psi.

GPM. This is where it can get tricky. It's all in what you are used too and can afford waste. Over spray etc.

Do some searching on that!

Welcome to the RCIA!

I have the internal bypass one also haven't used them yet, suppose the help with restriction. I am going to use the fatboy starting this season on my big rig. Have done fine with the 5850. The 5 GPM is best, though the 2 will work okay.

Thanks everyone,yeah i got the 5 gpm pump,all need to do when it arrives is set it up and test its performance on my oun house before putting it in service with customers.Thank you .