I use two water pumps – a 1HP Water Ace (cost circa $150) with handy carrying handle which I move to various rainwater collection tanks and then pump to the larger storage tanks (2,800 gallons) and thence to the top of the hill; and a Wayne PC4 0.5HP pump (cost $130) whose sole purpose is to pump from my 2,400 gallon carport tank to the top of the hill. At the top of the hill I have tanks which gravity feed the rainwater to the plantings. The Wayne worked fine until a couple years ago when I forgot to disconnect it in winter and the internal membrane (called the backhead) was shattered by ice. I did a cursory examination for parts on the internet, couldn’t find any, and replaced it. This past January, can you believe it, I again neglected to remove all the water from the pump (it was disconnected from the tanks but had water in it) and the backhead of the second pump also shattered. I googled and found on eBay a backhead replacement kit for $15 plus $3 for shipping. It made sense to self repair since if the repair worked I could also repair the previously damaged pump (I keep everything).
It is easy to dismantle, just remove 4 screws at the base of the motor housing which secures it to the pump housing, and the ice damage is easy to see.
First time round it is always difficult – how do I remove the backhead. Fortunately the manual is easily accessible on the internet and it suggested smashing the ceramic seal with a hammer driven screwdriver. I tried this at first but the concept did not appeal. So I found a puller I used for automotive work.
And with a few turns of the wrench the backhead was off, leaving behind the bearing to which it had been press fitted.
From here it was relatively simple to re-assemble the motor following the manual’s instructions and taking care, as I press fit parts together, to tap gently with a hammer and use improvised tactics, like this water pipe connector to ensure pressure is applied evenly to the part being fitted.
When all was assembled I decided to test the repair, and it works perfectly.