well bob since we've totally HIJACKED your own thread now...
just install the pump here!
based on my watered down brain recall, your link is in error.
both extreme series pumps use the 254 series strainer
quoting the BOXed instructions...
"•Use an Extreme Series High-Flow water strainer [Model # 254-266]"
so the extreme series 4.0 that i installed does have the 254-xx strainer.
the BOWL is larger and perhaps more robust, a little more surface on the screen inside.
don't use the 255-xx with the extreme series pump.
of course my wet cells may be flooded with bad juju too...
here's the schematic for the install on the 4.0...
and the strainer is noted near the end of page 1, which is the BOTTOM of the pdf (page 2 is at the top)
with the W word season approaching, why not wait till spring for this install?
could be new wata pumps by then; at the very least you won't be wasting 5 months of warranty.
i like the extreme 4.0 for 2 reasons...
1. it is virtually vibration free, only a few seconds at first flow then totally smooth/quiet, and not ANYWHERE as rattlin' at the oem pump.
2. it has NOT failed yet. (i went through 3 of the oem pumps during the 2 years of warranty)
BUT the volume/flow isn't really that great, nowhere near the 4.0 claim/spec, base on simply measuring/timing the water flow.
for the first 2-3 minutes flow is AWESOME, then it seems to dial back some.
i noticed this in the shower, so i guess it serves a purpose to remind me about usage.
based on having one for ~2 years now, i might go with the 5.7 liter version if given a mulligan.