Plastic Pressure Test Cover UN model SL S01312 — puncture-type test cap for 20/25/30/35 mm pipes

UN plastic puncture-type pressure test cap model SL S01312 is designed for temporary sealing and pressure testing of small-diameter pipes with nominal sizes 20, 25, 30 and 35 mm. The cap fits over the pipe end and allows controlled pressurisation to check for leaks and integrity during installation, repair or maintenance. Constructed from durable plastic, the test cover is lightweight and intended for short-term use in plumbing and heating systems where quick, reliable sealing is required.

Advantages

The puncture-type design enables easy insertion of a pressure hose or gauge without removing the cap, simplifying testing procedures. Made from resilient plastic, the cover resists corrosion and is suitable for wet environments common in plumbing and heating works. Its compatibility with multiple nominal pipe sizes reduces the need for several different caps on site, and its simple shape ensures fast application and removal by hand.

Suitable for

• Pressure testing of small-diameter plumbing pipes (20/25/30/35 mm)
• Temporary sealing during installation or system repairs
• Leak detection and integrity checks in heating circuits
• On-site plumbing and maintenance work where lightweight test caps are needed

Key specifications

• Type: puncture-type pressure test cap
• Material: durable plastic suitable for temporary wet-environment use
• Compatible nominal pipe sizes: 20 mm, 25 mm, 30 mm, 35 mm
• Application: temporary end sealing and pressure testing of small-diameter pipes
• Mounting: push-on fit over pipe end; puncture port for hose/gauge insertion

How to use

Verify the pipe nominal size before application and clean the pipe end of debris. Push the UN test cover onto the pipe end until it seats securely. Insert the pressure hose or gauge through the puncture port if required, taking care to follow the pressure limits of the testing equipment and system. Pressurise the pipeline slowly while monitoring the gauge for pressure stability and any signs of leakage around the joint. After testing, slowly release pressure, remove the hose or gauge, and withdraw the cap by hand.

Usage recommendations

Use suitable pressure measurement and safety equipment when performing tests. Do not exceed the pressure rating of the test equipment or the piping system. Inspect the cap for damage before each use and replace if deformed or cracked. Store the caps in a dry place away from direct sunlight to prolong their usable life.