Streamline 437-033C 1-Inch Schedule 40 PVC Slip Union

This is a Mueller Streamline Schedule 40 PVC union with solvent cement (slip) ends, catalog 437-033C in the Mueller line sold through plumbing distributors in Mexico. The part carries the molded marking PVC-U and a 1 in nominal size. A union joins two lengths of pipe with a threaded collar nut between two halves, so a section of line, a pump, a filter or a valve can be taken out of service and reinstalled without cutting pipe.

Each end is solvent welded to Schedule 40 PVC pipe using primer and PVC cement. Mueller describes this hydraulic PVC union for cold water pressure lines in residential, hotel, commercial and service installations, and notes that PVC does not corrode, oxidize or scale and creates no galvanic couple with other metals in the system. Plumbers, irrigation installers, pool and spa technicians and facility maintenance crews use unions like this at equipment connections where future service is expected.

Buyers matching a size should confirm against the part marking, since a distributor catalog lists 437-033C under a different size.

Available from King Surplus inventory in Del Rio, Texas.

• Product Type: PVC union (tuerca union), solvent cement ends
• Material: PVC (hydraulic PVC, marked PVC-U on the part)
• Schedule: Cedula 40 (Schedule 40)
• Nominal Size (part marking): 1 in
• Part Marking: PVC-U 1" 4-1
• Service: cold water pressure lines
• Brand: Mueller Streamline
• FLAG for review: Bedon (Mexico distributor) lists catalog 437-033C as the 1/2 in (13 mm) size; the part in our photos is marked 1 in. Catalog number and size should be reconciled.
• Spec Basis: nameplate photo (molded marking PVC-U 1" 4-1); Bedon product page for Mueller 437-033C https://bedon.mx/producto/tuerca-union-cementar-pvc-hidraulico-cedula-40-de-1-2-mueller-437-033c/