Adding to James' post about Grundfos SQ pumps:
The 1/2 HP models (only) are available in 115V as well as 230V. The
5SQ05-180 pumps around 5-6 gpm at up to about 300' of TDH, or 200'
plus pressurizing in a single-pump installation. This makes it an
ideal replacement
One thing to add on the horizontal installation: Even with the soft start I
have had the pump break unscrew partially Sched 40 PVC pipe in more than
one installation. I would add a couple of horizontal pieces of unistrut and
(I think its 2.5 or 3) unistrut clamps around the pump to keep the pump
I've seen similar on what I considered to be some low grade modules used
on a project in Peru. Returning them / doing anything about it wasn't an
option due to the remote nature, but I sure didn't like it. Best case, you
lose a tiny bit of current due to cell coverage; worst case is internal
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