1-wfp.co.uk
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Thanks, I've just checked that and understand it's limitations, I've spent days just doing the same window on my house and have tried everything but if I connect to a tap and run it at the speed I want on my brush it works as expected but if stop the flow the tap is still on and even that low pressure will blast some resin out when I pull on my uni valve to restart.The controller you linked to I think is similar to what you are currently using as in it relies on the pumps built in pressure switch to stop the pump. What this means is that the pressure in your DI and hoses will be up around 100psi when you shutoff your flow to your brush. A Spring controller (most window cleaning suppliers have their own branded versions - look for V16) can be calibrated to detect when you close off the flow to the brush and not over pressurise the system. So when you open the flow you won't get a big burst of flow. The V16 type controllers are kinder to your pump and will use less battery power.
I'm not predicting that a V16 controller will solve your problem.
I assume after you bought the new heads and tubes you flushed out your hose as it might still have resin beads in? Do you still get the same issue if you just use a single DI? Swap both to check.
I've checked out the V16 and I was looking at it's dead end detection, just not sure if I can program it on this one.
Thanks for the reply.