Refrigeration Oils, Vacuum Pump Oil & HVAC Fluids

Compressor oils, vacuum pump oil, coil cleaners, UV leak detection dye, and system flushing fluids for air conditioning and refrigeration maintenance. POE, PAG, and mineral oil grades stocked for all common refrigerants. Same-day dispatch from UK stock with trade pricing.

Compressor Oils

Correct compressor oil selection is critical for system reliability and warranty compliance. POE (Polyolester) oil is required for HFC refrigerants including R410A, R32, R134a, R404A, and R407C. PAG oil (grades 46, 65, 100, 150) is used in automotive A/C systems with R134a and R1234yf. ZEROL HD 46 is the specified compressor oil for R1234yf systems. Mineral oil is used with older R22 systems only — do not mix oil types. Always add the correct oil grade and quantity when replacing a compressor or after system flushing.

Vacuum Pump Oil

Dedicated vacuum pump oil for single and two-stage HVAC vacuum pumps. Change oil every 10–15 hours under heavy use or whenever the oil appears milky or discoloured — moisture contamination reduces pump performance and ultimate vacuum depth. Available in 1L bottles. Vacuum pump parts and exhaust filters are stocked separately.

Coil Cleaners & System Chemicals

Evaporator and condenser coil cleaners for routine AC maintenance — including alkaline HydroCoil evaporator cleaner, RectorSeal Clean-N-Safe, and EasyClean universal coil cleaner. Regular coil cleaning restores heat transfer efficiency and prevents biofilm buildup. Browse all cleaning chemicals including descalers and drain maintenance products.

UV Leak Detection Dye

UV fluorescent dye for injection into refrigerant circuits to identify leak locations under UV light. Compatible with R410A, R32, R134a, R1234yf, and other common refrigerants. Use with a UV lamp from the Leak Detection range for visual confirmation of leak source.

System Flushing

Refrigerant circuit flushing agents for removing contamination following compressor burnout or system contamination. Flushing is required before installing a replacement compressor to prevent acid and debris from damaging the new unit. The Mastercool RecoveryMate moisture and oil separator is stocked for use during refrigerant recovery.

Trade accounts available — call 0161 775 1190 for volume pricing on oils and fluids.