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John Guest

John Guest Stackable Reducer Stem - 15mm Stem x 10mm

Part Number: PEM061510W
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The John Guest Speedfit Reducer Stem quickly connects two unequal sized Speedfit fittings to reduce line size. The reduced spigot end allows for two Speedfit push-fit fittings to be joined, creating a swivel type connection while reducing the line size. Simply push the push-fit fitting fully onto the pipe and twist the plastic nut clockwise to lock in place. To disconnect, unlock the nut by hand and push the collet towards the body of the push-fit fitting and pull the pipe to release. The Speedfit reducer is up to 40% faster to install than traditional methods and is easier to use in confined spaces by removing the need for hot works and tools. 

  • Instant push-fit connection
  • Install and uninstall in seconds without tools
  • Safe flame-free installation, with no hot works, glue or flux
  • Grip & Seal collet with stainless steel teeth and main O-Ring seal
  • Twist & Lock mechanism secures fitting and adds compression
  • Non-toxic, resists corrosion and no scale build-up
  • Compatible with Speedfit PEX and polybutylene plastic pipe (inserts required) and copper pipe
  • Suitable for hot and cold water and central heating systems
  • EPDM O-Ring
  • Requires Pipe Insert or Superseal Pipe Insert to prevents over constriction of pipe from compression fittings

Application Usual working Temperature Maximum working Temperature Maximum Working Pressure, bar
Cold water (indirect & direct mains) 68┬░ F 68┬░ F 12
Central Heating 180┬░ F 220┬░ F 3
Hot water (including unvented cylinders) 149┬░ F 203┬░ F 6


California residents Prop 65 Warning
This product contains materials known to the State of California to cause cancer and birth defects or other reproductive harm. www.p65warnings.ca.gov