Pump hammering after installing accumulator
I have a class B with a nearly new pump (Shurflo 4008, installed about 1 year ago). Even with the bypass, running the sink caused pump cycling to a degree though not as bad as it was with the old 3 ch...
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If the 4008 pump keeps running slowly after the pressure is up, I can't believe it didn't have the same problem before you installed the bladder tank.
The problem is common on that bypass type pump, and is easily corrected by adjusting it, by turning a little allen screw. There are 2 of them as I remember, one being the on/off pressure adjustment, the other being the bypass pressure adjustment, which is the one that needs adjusting.
You can trust me on this because I been down this road when I first bought my 4008. I installed it, and it wouldn't completely shut off. I went back to the dealer w/ the problem, and they didn't have the foggiest idea, so they called shurflo, and they right away said to turn the allen screw 1 full turn (don't remember which way) to fix the problem, and they were very correct. I would hope one of the techs here could tell you the exact location of the screw, as I don't remember 3 years ago, but I do remember it is near where the wires connect
The problem is common on that bypass type pump, and is easily corrected by adjusting it, by turning a little allen screw. There are 2 of them as I remember, one being the on/off pressure adjustment, the other being the bypass pressure adjustment, which is the one that needs adjusting.
You can trust me on this because I been down this road when I first bought my 4008. I installed it, and it wouldn't completely shut off. I went back to the dealer w/ the problem, and they didn't have the foggiest idea, so they called shurflo, and they right away said to turn the allen screw 1 full turn (don't remember which way) to fix the problem, and they were very correct. I would hope one of the techs here could tell you the exact location of the screw, as I don't remember 3 years ago, but I do remember it is near where the wires connect
