Water Pump connections

[Hambone9999]

The clear connection fitting was loose so I pushed it back in but how do I tighten these fittings? Is it normal for the pump to kind of make a stuttering noise when running (only when I turn the tap on).

 

[Scott Danforth]

they are push-to-connect fittings

and yes, the pump will hammer a bit at low flow as it is building pressure, and being turned off by the pressure switch, then loosing pressure because you have the sink running

turn the faucet/tap on full and the pump just runs.

 

[tpenfield]

Those are the Whale Quick Connect fittings . . .

https://www.whalepumps.com/rv/plumbing.aspx

They use the water (liquid) pressure to hold them tight . . . provided that they are inserted into the fitting properly.