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John Guest STSI28 Super Seal Pipe Insert - 3/4 Inch

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Acetal body sealing insert for 3/4" pipe and fittings. It is recommended that this insert only be used with John Guest Speedfit pipe and fittings to achieve the most secure seal.

NOTE: This is a clearance item with limited inventory. All sales final - no returns.

Technical Specifications

Max PSI: 160
Max Temperature: 200 degrees F
Type: Fitting/Coupler

Product Description

Super Seal 3/4" Insert

This John Guest STSI28 Super Seal Insert is an acetal insert with two o-rings. It is designed for used with 3/4" CTS pipe and fittings. This corrosion and scale-resistant insert is used to create an incredible seal that prevents leaks and weeping. One o-ring is on the stem and stops water from inside the pipe from leaking outside the insert. The other o-ring is inserted inside the fitting and acts as the primary seal between the pipe and the fitting. Using an insert also ensures that pipe has a clean end free of any imperfections from cutting that may hurt the integrity of the seal. The insert also helps pipe and tube maintain consistent shape.


  • Compatible with 3/4" CTS fittings and pipe
  • Acetal construction - No corrosion or scale buildup, lead-free and non-toxic
  • Two o-ring seals - double layer of leak security both inside and outside fitting
  • Maximum Pressure: 160 PSI
  • Maximum Temperature: 200° Fahrenheit
  • This is a clearance item with limited inventory. All sales final - no returns.

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