Not a drip
I drained my water system for winter by opening the taps and calorifier drain valve and letting it run dry. I’ve now refilled the tank and turned on the (self-priming) pump: it runs but there’s no water: any ideas?
QADid you turn the main water cock off and forget to turn it back on? Is there a non-return valve in the pipe between the tank and pump – if so, with the pump running, tap it with a block of wood just in case it has stuck. Likewise, there might be a blocked strainer on the pump inlet.
If it is a Jabsco flexible impeller Water Puppy system, you should have drained the impeller housing. If not it might have frozen and bowed the cover. Take the cover off and inspect it, the gasket and the impeller. Change for new as required and squirt some water into the pump before you put the cover on. If it’s a piston pump, the valves might be jammed by muck. I don’t advise cleaning these because they tend to leak on re-assembly.
Push a wooden plug into the tank breather/ overflow, pack around the filling hose with rag, turn the pump on and then turn the filling water on, holding the hose and packing so you pressurise the tank. With luck this will get water into the pump and it will work. Alternatively, turn all the taps off bar one, turn the pump on and suck very hard on the open tap. It will have similar results – mind the taste of three-month-old water!
Finally, if the motor is running but the pump is not pumping the pump drive may have broken.