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DerekS · 21st March 2012, 00:08

Quote ' I would guess then, that the UBP is a different type from the ITP and is logically positive displacement. It must have sufficient 'suction' to raise fuel from the tank (via the dead ITP) .'

Open to correction here, but surely the UBP is the same as the ITP, Both look the same type, long cylindrical. The UBP is of the double interlocking helical type. That cant be positive displacement ? or can it ?.

21st March 2012, 00:08	#6
DerekS Posted a thing or two Rover 75 Tourer Join Date: Nov 2006 Location: Malpas Posts: 1,526 Thanks: 34 Thanked 118 Times in 89 Posts	Quote ' I would guess then, that the UBP is a different type from the ITP and is logically positive displacement. It must have sufficient 'suction' to raise fuel from the tank (via the dead ITP) .' Open to correction here, but surely the UBP is the same as the ITP, Both look the same type, long cylindrical. The UBP is of the double interlocking helical type. That cant be positive displacement ? or can it ?.