This is a valveless version for pressure washers.
Flat Face Stainless Steel + Viton Coupler, interchangeable with Stucchi (Holmbury) FL.
Snaptite 71 Series (Steel) Nipple (BSPP/NPT).
Gromelle Interchange Dust Caps & Plugs - Caps
Gromelle Interchange Dust Caps & Plugs - Plugs