I have two of these foot pumps, one in the cabin and one on the boat. I've tried other designs but none can compete with these. Flipper pumps and hand pumps all leak, if not in a week then certainly in a year. Tiptoe pumps just don't move enough water.

I like these because they're hands free which is great for washing your hands, etc. They're about 30 years old & I recently replaced a cracked part in one of them so parts are still available and the design hasn't changed.

Both of them are screwed to the floor under the sinks with just the foot pedal exposed. Both are feeding simple filtered water faucets, the cabin one draws from a 5gal blue camping tote also under the sink.

The pumps are double acting, they pump on the downstroke and the upstroke. They move about 4 gal/ minute and can easily be short-stroked to produce just the amount you need.

As with any manual pump they can be sensitive to particles in the water that can cause them to drain back from the faucet - they never leak but if not used for a while you may have to pump once or twice to get water back up to the faucet (common with all manual pumps and even some powered ones).

They can be changed from right hand to left hand operation which refers to which side the inlet & outlet hoses are on.

They're pricy at $90 but well worth it.

https://www.amazon.com/Whale-Marine-Gusher-Operated-GP0551/dp/B00H93M3RO/ref=mp_s_a_1_4