Parts cost

[keithgdg]

Can anybody enlighten me as to why jabsco can justify selling a waste water extraction pump with a 38mm outlet at nearly £200.00 but the same pump with a 19mm outlet for fresh and grey water at nearly £100.00 less when the only difference seems to be the pipe connection sizes. Is this one or the office of fair trading me thinks?

 

[Sandyman]

They don't have to justify anything. Just put 'Marine' on it

 

[prv]

They don't have to justify anything full stop. A company is free to charge what it likes for its products, and free to go out of business if nobody wants to buy them at that price.

Pete

 

[rivonia]

Buy the cheaper one and fit an adaptor.

 

[Trident]

I believe the waste water one is designed to not clog up with the sort of detritus found in shower sumps etc so has to be more robust and has a different internal section - fresh water is clean and (should be) particle free so is easier to pump.

 

[keithgdg]

38mm diameter pipe will have a much larger flow rate than 19mm. I suspect that 38mm is used for a reason. Maybe 19mm wouldn't be able to keep up with the quantity of water being supplied to whatever is being pumped out.

If the OP drills a 38mm hole in the bottom of his boat he could drain the water out through that - just a suggestion.

I think I'll pass on the hole........I suspect the pressure in would be greater than the pressure out therefore the boat would sink......just a guess you understand!