Craigpump
In the Trades
The only time I've seen galvanized under PVC is if the pump continues to run dry and melt off the pipe.
Forget galvanized, it corrodes from the inside out. Besides, the customers is paying for the materials, why not do a better job?
That's how I read it the first time and 'thought wow this guys an idiot' but on rereading he wants to put the pvc at the pump and the galvanized up higher. It's not mindbogglingly harmful as the reverse.
I've never done that. I don't really see the benefit to a mixed drop pipe pipe. Supporting the weight isn't the issue, PVC has that no problem. It's standing up the the torque and pressure that is the limiting factor for PVC. The way I see it is it can be done in all PVC or all Galvy, pick your poison. On the 5HP I opt for steel.
If the 5HP pump does a soft start/soft stop with a torque arrestor on the PVC pipe, that should soften the wear and torque on the PVC pipe, right?
How many cycles do you think that Subdrive75 that I posted did in 10yrs?
Haven't had any problems with mine and they are a switch valveman.
https://franklinaid.com/2007/03/25/how-subdrive-and-monodrive-measure-water-pressure/
Haven't had any problems with mine and they are a switch craigpump.
How many cycles do you think that Subdrive75 that I posted did in 10yrs?
Haven't had any problems with mine and they are a switch craigpump.
As a matter of fact, we’ve never been able to wear one out in our laboratory life cycle testing.
Do the Goulds VFD systems use a similar setup like the Franklin?
I can't find where they said that. But if it is true then they are not testing in real world conditions, or longer than a couple of months.
They are right in my books!
I've got one customer who goes through at least one a year on her irrigation system. In fact, we have an extra one on the shelf next to her tank.
I'd like to take the POS VFD out and replace it with a dumb pump and CSV, but the wire is too small and they don't want to trench in another conduit and wire....
This is awkward, but...
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