Mt Draw Off Cock Type B

Use the Mt Draw Off Cock Type B when you need a drain point in a threaded socket. Its inlet screws into the tapping, and the outlet takes a hose, so the system can be emptied cleanly.

Fitting the Mt Draw Off Cock Type B

A typical job is a threaded tee at the bottom of a heating drop, or a spare tapping on a cylinder or tank. The 1/2″ version covers most domestic work. The 3/4″ version drains quicker, which saves time on bigger systems. Fit one at each low point, so no section is left holding water.

• Sizes: 1/2″ and 3/4″
• Screw in threaded body
• Hose union outlet
• Square spindle for a drain key or spanner

Use tape or jointing paste on the thread and tighten with a spanner on the hex, not on the outlet. Turn the outlet to a sensible angle as it tightens. After refilling, check the spindle for weeps and nip it shut if needed. Do not leave a hose attached, as children or pets can open it. More drain fittings are under Draw Off Cocks.

Drain off cocks in Glasgow

Type B drain cocks come from Plumb Parts, 555 South Street, Glasgow G14 0QX. Trade counter open Mon-Fri 8am-5pm and Sat-Sun 8am-1pm. You can also order online.

Specification

• Connection: Threaded male inlet; hose union outlet
• Sizes: 1/2″ or 3/4″
• Suitable for: Drain points screwed into female tappings

Common Questions

Which size Type B drain cock do I need?

Match it to the female tapping it screws into. 1/2″ is the common size on pipe fittings and boilers, and 3/4″ on some tanks and cylinders.

What do I use to open the drain cock?

A drain key or a small spanner on the square spindle. Turn it slowly so the water does not rush out round the hose.

Can I leave a hose on the drain cock?

Take it off once the system is drained and refilled. Fit a cap on the outlet if it is somewhere it could be knocked open.