[gw204]

Here's my setup:

Clamshell scoop -> bronze seacock -> reinforced hose -> strainer -> reinforced hose -> Shurflo Blaster pump -> garden hose w/ cheap plastic nozzle.

It doesn't leak one bit while running or with the pump turned on and the nozzle closed.

I ran the garden hose directly to the pump as I was in a hurry and didn't have the time to determine where I wanted to mount a spigot.

Fix or replace your cap and you should be OK.