Our PH1L pressurisation unit is a simple, robust and reliable mechanical pressurisation unit designed with over 50 years of experience in sealed system equipment.

Throughout a heating system, there is always potential for slight leaks to occur which gradually decrease system pressure leading to inefficient or disabled heating. Once installed, the PH1L will automatically maintain optimal system pressure by detecting any loss of pressure via pressure switch. The unit will then top up the system to its original cold fill pressure thus maintaining optimum performance and efficiency of the heating system. The continuously rated pump features a stainless steel body with a polymer impeller to help prevent pump seizures through infrequent operation, something common in other pressurisation units.

With its modular build, a PH1L unit can be tailored to the specific requirements of the system.


The PH1L can be used for the following applications:-

  • Sealed Heating Systems
  • Sealed Chilling Systems
Key Features
  • Cold Fill Pressure: Up to 2.8 Bar
  • Pressure Switch Control
  • Floor Mounted
  • Single Pump
  • 18L Capacity Tank with AB Air Gap
  • Easy Maintenance
  • Larger Pump options to provide higher cold fill pressures
  • Fused Spur / Starter
  • High & Low Pressure Switches
  • Low Water Protection
  • Pump Body: AISI 304 Stainless Steel
  • Pump Impeller: Technopolymer (Noryl)
  • Pump Shaft: AISI 304 Stainless Steel
  • Mechanical Seal: Ceramic / Carbon / EPDM
  • Non-Return Valve: Brass / Nylon Insert
  • Fittings: Brass
  • Pressure Vessels: Polypropylene Liner / AISI 304 Stainless Steel Connection

Still Unsure Of What You Need?

Contact our team of experts today on 01902 333 111