Bosch 044 check valves

[Boosted Esky]

Are the factory supplied check valves ok to use in a twin pump set up or is it better to use an aftermarket one like Speedflow etc? The twin pump fitting kit I bought is designed to be used with the factory valves but I havebeen told they're rubbish and can cause the pumps to be excessively noisy. Thanks

[Ben C34]

They aren't the best flowing items, that's the problem. I would hate to think how bad that inlet side of that setup would flow. Pumps really don't  like inlet restrictions

[KiwiRS4T]

Regardless the Bosch pumps are very noisy.