[Richard iSparkle]

http://www.allpressuresprayersdirect.co.uk/cobra-ct15250phr-petrol-engine-driven-pressure-washer-15-lpm-250-bar

I'm looking for something to get me going on domestic driveways, decking, and possibly roofs.

Will this type of thing do a job?

[BDCS]

That would be fine but a diesel would be far cheaper to run

[Matt Gibson]

I bought my new pump from them. was the cheapest i found and was delivered in two days. good service and response to emails too.

[johnny bravo]

what is the main difference from RTT models  having an external unloader valve with return to tank bypass,  what difference is this for your washer,    or does it not matter  full price £1260.

[johnny bravo]

did you not want to buy one off ebay and get a service on it.   

[BDCS]

An internal by-pass just dumps the water back into the inlet manifold so the same water is going round and round getting very hot which wrecks seals etc. An external by-pass dumps the unloaded water into a seperate return line which you run back to tank, this means the pump is still fed cool water even when unloaded for longer periods.