McAlpine Offset Anti-Syphon Basin Trap – OBT1V

The McAlpine Offset Anti-Syphon Basin Trap – OBT1V is part of the McAlpine Tubular Traps range (maker code OBT1V). It suits plumbers, installers and homeowners carrying out new work or a straight replacement.

• 75mm Water Seal
• 1¼” Universal Compression Outlet suits all plastic, copper and lead pipes
• Adjustable Inlet makes trap suitable for all domestic repair, maintenance and improvement work
• Anti-Syphon Valve neutralises negative syphonic pressure and eliminates gurgling
• Anti-Syphon Valve is removable for cleaning purposes

Specification

• Brand: McAlpine
• Range: Tubular Traps
• Maker Code: OBT1V
• Standard/approval: BS EN 274-1

Common Questions

Which trap size do I need for a basin, bath or sink?
Basins normally take a 1¼” (32mm) trap, while baths, showers and kitchen sinks normally take 1½” (40mm). Match the trap to the waste outlet and to the size of your waste pipe.

What water seal depth should I choose?
A 75mm seal is the usual choice for basins and sinks. Shallower 50mm or 38mm seals are made for baths and shower trays where there is little room under the outlet.

Do I need tools or PTFE tape to fit a plastic trap?
No. Plastic traps seal on their own washers and are tightened by hand, so tape and spanners are not needed and can split the nut.

Datasheets

• McAlpine OBT1V Technical Drawing (PDF)

Collect from Plumb Parts, the plumbers merchant at 555 South Street, Glasgow G14 0QX (Mon to Fri 8am to 5pm, Sat and Sun 8am to 1pm), call 0141 404 5128, or order online for UK delivery. Prices are shown ex VAT.