Pump - rigid plumbing

tomtucson

tomtucson

New member
Are there any reasons not to plumb the pressure side of the pump with sched 80 and eliminate hoses? "the guy" at General pump said you should use flexible hose for the supply so it could flex with the pulsations or something.
 
Thats the way I thought it had to be. Just to avoid any broken lines in the middle of the night. Or a not so smart employee stepping on the pipe by accident.....
 
I run inch and a half line to just below the pump and then a one inch line up to the pump. It works great and have never had a feed line problem.
 
I wouldn't plumb the inlet or discharge rigid. There is a certain amount of vibration in a running pump / engine which would be transmitted through rigid plumbing, possibly damaging another component in the process.
 
The inlet hose is the one general says should be flexible to 'pulse' with the pump. The vibration factor makes sense to having flexible hose. I am just tired of the whip hose and the fittings that corrode by the first week or so - nickel schmickel, zink schmink - those things corrode immediately. I was thinking about some inexpensive stainless pipe and fittings which would also not have the restriction of the hose fitting. As far as I've seen there are stainless hose fittings - about $50 each!
 
When I used steel pipe I would break off at the threaded input. After I changed to the black pvc threaded/barbed input, no more breakage. Make sure to use stainless clamps.
 
Russ, do you think if the pipe had a quick connect at one or both ends - pump / unloader - that would be 'flexible' enough to work with the vibration?
 
From when I first started I always heard 'don't mount the unloader on the pump' because of stress or something so I never did. But quick connects on everything is so nice, I think. Everything just pops apart in seconds, I don't know if its recommended but I haven't had any trouble.
 
tomtucson said:
From when I first started I always heard 'don't mount the unloader on the pump' because of stress or something so I never did. But quick connects on everything is so nice, I think. Everything just pops apart in seconds, I don't know if its recommended but I haven't had any trouble.
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Quick connects sure does make it convenient, the reasons i think that they dont like the quick connects by the unloader is the maintenance increase of couplers with the vibration and the possibility of piece of the O ring getting trapped in the unloader causing failure to function.
 
tomtucson said:
From when I first started I always heard 'don't mount the unloader on the pump' because of stress or something so I never did. But quick connects on everything is so nice, I think. Everything just pops apart in seconds, I don't know if its recommended but I haven't had any trouble.
Click to expand...

I do it all the time. Use a close hydraulic nipple, you can't have it hanging out too far Or, if you want a semi permanent connection, use the 22 mm european style couplers.
 
brass inlet fittings all the way !!

Ditto Russ..
we never use rigid for several reasons.. as mentioned above,
and brass inlet fittings all the way !! they don't corrode,
and way less expensive than stainless.
we'll soon have plumbing examples on our website,
in the mean time.. e-mail me for free images.
 
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