BIOTEK MARINE - PVC WHITE UNION SLIP FITTINGS BioTek Marine Sale! from 108 /per Options PVC Union 1/2" White Slip BioTek Marine PVC Union 3/4" White Slip PVC Union 1" White Slip PVC Union 1 1/4" White Slip PVC Union 1 1/2" White Slip PVC Union 2" White Slip Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. BioTek Marine PVC White Union Fittings BioTek Marine PVC White Union Fittings are available in 1/2", 3/4", 1", 1 1/2" and 2" sizes. PVC UNIONS Color: White and Gray Socket & Threaded Sizes ½” – 2” Rated at 150 PSI @ 73° F EPDM O-Rings