Gee, that is surprising. I'm a 240 person and the 700 is a different kind of animal inside and out.

The check valve use to be $11 for the K and $18 for the LH. Screwed right on the end of the outlet.

Every pump I have lifted from PNP has had them. I can not imagine how they are holding rest pressure with out one. The rollers in the pump will still leak by around the ends, if no where else. I like having a spare pumps. If not just for the check valves.

Inside the check valve there is a spring and steel ball. When the pump pluses fuel it makes the spring flex. In doing so it fatiques. Causing it to sway to the inside the housing. This wears the spring thin on one side. It gets more weak. Then it fails all together.

Slow, unsteady symptoms have been my experiences.

The accumulator/filter I think is only a spring loaded flow controlled/reservoir.

Since I have less experience on 700. I'm not one to say that didn't find another way to skin the cat and keep rest pressure.

If they don't offer a valve. Maybe they can sell more pumps because by the time the check valve wears out the pump could or could not be really old.

Doing business this way. They are done with out a return issue on their service work.

Just the customer is the unaware cat! $20 instead of $200 or more in parts.

Good Luck. See you on the BB.

Phil