3 LPG gas regulators in 6 months

had the same problem with my new van the prob was with the flexable hose.
so i changed to a copper line and it fixed the problem

Are the lines from the gas bottles to the regulator flexible? If they are that will more than likely be the problem. A change to copper will fix the problem, I can`t believe they are still fitting the flexible ones so many people have had trouble with them including me.

Hello TR.

A bit of clarification required here. I dissected a couple of failed 2 stage regulators. In each case I found the first stage rubber valve seat decomposed, swollen & deformed to the extent it blocked the first stage outlet gallery. The rubber seat was coated in amber coloured oily/greasy material. We can debate where the material comes from, cylinder contents, hose or reaction between both.

The important thing is to ensure your regulator is mounted well above your gas cylinder outlet valve and that the supply line, be it hose or tubing rises to the regulator inlet without dips, coils or loops. This allows for any condensed product or material in liquid form to run back into the cylinder rather than accumulate in the supply lhose/tubing dip, coils or loop until it collects in sufficient quantity to be pushed into the regulator.

See the following link for details:
http://www.dariocaravans.com.au/page.asp?parentid=11&productid=1164
Regards: Grant.