[C320-list] Blockage in head sump pump hose

[Mark Gillingham]

I noticed that water was not draining out of the head water collection
basin in the floor and found that the pump was operating. Once I put more
water in the floor basin, the pump blew the outbound hose connection off
the pump. The water quickly drained into the bilge. I took the backflow
filter apart, thinking it was filled, but that was clean. I reconnected the
hose and pumped more water. This time I noticed that spray was coming out
of the syphon preventer--the more I lossend the cap, the more water sprayed
out. So, the blockage is on the outbound side of the syphon.

What could cause this blockage and how can I clear the hose? Should I
expect dead animals?

Mark, Speakeasy #612

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