Anybody have experience with the pumphead in a Ashbys Ninja 400. Took my Ninja to Ashbys for a service and was told I got a small leak from the pumphead, due to using Prochem Crystal Green. The price Ashbys gave me was around £ 222.00 plus VAT. I can easy fit it myself. The pump do take longer time maintaine pressure than it used to do. Have been looking around for pumpheads and have found heads for around £ 190.00. Ashbys promote there pumphead got a special coating which should make it last long, but this pump is less than 2 years old with a very little use! Have anybody had the same experience. 
Many thanks
Firstly, I would avoid Prochem in-tank powdered detergents. Crystal Green and Double clean precipitates out at high heat and causes scaling problems that drastically reduces the pumps life.
Secondly, induction pumps are over rated. Not only are these pumps expensive, these types of brushless motors decline in efficiency over a very short period of time.
I have found standard Diaphragm pumps to be the most effective. The pump will run at the same efficiency throughout its life and die only when the brushes wear out.
Good quality in-tank powders have de-scaling and lubricating property’s that actually extend the pumps life. Only use a high temp when you need it, everyday domestic jobs require 55/60oc.
Avoid using just water in the tank. The lime scale build on the rubber plungers in the head creates a stiffening effect that reduces PSI, heat also escalates the problem.
Flush any in tank acids clear of the pump after use as these can also erode seals if left in the pump.
Peter
