Dont do it , its there for a reason , corwoods may well do this , but at what price .
I once had a domestic boiler go bang , the heat exchanger burst due to over heat , flames and water all over the place .
Not the same kettle of fish i know , but for the sake of stopping the flow every 15 mins whats the hardship , i would rather lose 4 miutes an hour than my van .
Plus the insurance would never pay you !!
Rich