1.5" Valterra Knive Valve Slip x Slip B6101X
This is a multi-part slice valve with 1 1/2 inch slip connections on both ends for 1 1/2 inch inner diameter hose or pipe.
Manufacturer ValterraGate Valve...
1.0" Slip x Slip Ball Valve 0250-10 by Magic Plastics is a quality ball valve with handle. 1 inch refers to the inner diameter of the connecting hose or pipe.
Gate Valve 1.5" Slip x Slip UniBody 0501-15 is a service valve for hot tubs with 1 1/2 inch plumbing. The slip connections accommodate 1 1/2 inch inner diameter flex hose or pipe on either end.