Hansen True Fit Threaded Fitting Install Guide

• Check the size and thread: True Fit threaded fittings use BSPT (tapered) threads. Hansen's mm sizes are nominal BSP sizes, so 15mm = 1/2", 20mm = 3/4", 25mm = 1"
• Check pressure and temperature: Max 16 bar at 20°C for 6–50mm, 12 bar for 65mm, 10 bar for 80–100mm. Cold water use up to 60°C (140°F) maximum
• Check chemicals: For anything other than water, see our Hansen chemical compatibility chart or contact us
• Follow the standards: Install as per the applicable standards and approvals for pipe and fittings, and follow the pipe manufacturer's guidelines. Hansen notes that not doing so may void its warranty
• Have ready: Plastic-compatible non-hardening thread sealant (Hansen recommends Loctite 5331) or PTFE thread tape, plus a spanner or pipe grip

Step 1 — Seal the Thread

Use a thread sealant on every threaded connection, even though the threads are tapered. Choose either:

• (a) Thread sealing paste: Hansen recommends Loctite 5331, or
• (b) PTFE (Teflon) thread tape

Hansen's guidance: "The right sealant for threaded joints is non-hardening, compatible with plastic and doesn't add slipperiness to encourage over-torquing."

Applying tape (from Hansen's handy tips video): Wrap clockwise when looking at the end of the male thread. Start slightly back from the leading edge so the fitting starts easily, then build the tape back along the thread. You don't need much: typically under four wraps, up to about eight to ten depending on the fitting or valve.

Hansen's Threaded Fitting Handy Tips: thread tape direction, how much tape to use, and hand tight plus 1–2 turns.

Step 2 — Screw the Pipe or Fitting In by Hand

Screw the male thread into the fitting by hand until you feel it start to seal on the tape or sealant. Hansen's tapered threads and strong material help minimise cross threading.

Step 3 — Tighten: Hand Tight + 1 to 2 Turns

Tighten until firm with a spanner on the hex or a pipe grip. One to two turns past hand tight should be all that is required, and no more. As Hansen's video puts it, the goal is a good seal, not how tight you can make it.

Step 4 — Support the Pipework

All pipe work must be adequately supported, so the fitting isn't carrying the weight of pipes, valves, pumps or meters. This matters most where nylon fittings connect to heavier metal fittings.

Hansen doesn't publish a separate pressure-test procedure for True Fit threaded fittings. It does say to install as per the applicable standards and approvals for pipe and fittings, and to follow the pipe manufacturer's guidelines. For any test:

• Never exceed the fitting's rating: Test pressure must stay within Hansen's maximum working pressure for the size and water temperature (table on the right)
• Test with water: Hansen's pressure ratings apply to fittings used with water and installed to Hansen's specifications
• Follow the standard for your job: Use the test pressure and duration required by your plumbing standard, consent or pipe manufacturer. Ask your plumber if unsure
• If a joint weeps (our tip): Don't keep cranking it past one to two turns. Depressurise, undo it, clean the thread, re-apply sealant and remake the joint

• All pipe work must be adequately supported
• Use a thread sealant on all threaded connections. Hansen recommends Loctite 5331
• If you're using chemicals or have special requirements, check our Hansen chemical compatibility chart or contact us
• Refer to the dimension tables for minimum recommended hole sizes
• Install fittings to the applicable standards and approvals for pipe and fittings, and follow the pipe manufacturer's guidelines. Not doing so may void Hansen's warranty

1. Seal the thread

(a) Use a thread paste sealant, or (b) a Teflon tape sealant. The right sealant for threaded joints is non-hardening, compatible with plastic, and doesn't add slipperiness that encourages over-torquing.

2. Screw in and tighten

Screw the pipe into the fitting. Do not over-tighten. The recommended way to assemble a threaded pipe fitting is hand tight, then tighten until firm with a spanner or pipe grip. One to two turns should be all that is required.

20°C figures are Hansen's published maximums. The 40°C and 60°C figures are read from Hansen's derating graph. Fittings are rated for water only, installed to Hansen's specifications.