<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by LK23:
As I previously posted, I have replaced 4 ShurFlo 5.7 water pumps in the past 2 years (froze after being blown out). I called ShurFlo today and asked if there was an acceptable method of winterizing the pumps (not with anti-freeze) to insure they would not freeze. I specifically asked if I disconnected the input side of the pump and was told it would still freeze.
After considerable discussion, the lady at ShurFlo essentially told me that you either put anti-freeze in the pump or take it out and store it at home.
Anyone aware of a better pump that can be blown out or otherwise be winterized? Don't try to convince me to use anti-freeeze. For medical reasons, we will not put RV anti-freeze in our system. </div></BLOCKQUOTE>
Looking at the repair parts diagram I would say that just about any multi diaphram pump made over the past decade could be a problem for you and not just the SureFlow 5.7.
Since the pump is completely rebuildable I don't understand replacing them instead of replacing the part that cracked when they froze.
Removing the pump or just the pump head is probably not that bad an idea if you can't use RV antifreeze for medical reasons. The manual indicates that they provided quick disconnects for the water lines to make this even easier.
""¢ SHURflo quick-connect fittings provide easy installation
and removal if required. The fittings are designed with
dual o-rings, creating a seal when snapped into place.
Lubricate o-rings with silicone-based grease.
"¢ NOTE: Remove clips completely from pump during
maintenance and storage to avoid distortion.
ļ«ISO Certified Facility
SHURflo reserves the right to update specifications, prices, or make substitutions
To Insert Fittings:
Clips have the word FITTING' on them
1. Hold fitting with _" wrench and tighten
plumbing to fitting.
2. Make sure o-rings are lubricated
3. Insert fitting into quick-connect port.
4. Snap lock clip over fitting and lock tab
with fitting' facing out toward fitting.
To Remove Fittings:
1. Pry up edge of lock clip over lock tab one
at a time.
2. Remove clip and slide fitting out of port.
Fully install clips or remove
completely during maintenance and
Mind you that salted water or a few drops of alchohol in water and other home made types of antifreeze alternatives and may be a consideration.