Petrol and LPG filters
Petrol and LPG filters protect the injection system of spark-ignition engines from solid contaminants and resins present in fuel. In gas installations the vapour-phase filter captures oily particles from the reducer/vaporiser and heavy hydrocarbon residues that could clog gas injectors.
At Filtry.org you will find inline petrol filters, liquid-phase and vapour-phase LPG filters and CNG filters. We supply HIFI Filter, SF Filter and PZL Sedziszow products for passenger cars, vans and light machines with petrol or gas engines.
Frequently asked questions
How often should the petrol filter be replaced?
In passenger cars every 30,000-60,000 km. In older vehicles with a metal inline filter — every 20,000 km. Modern filters integrated with the fuel pump (in-tank) are replaced every 100,000 km or per the vehicle manufacturer's schedule.
Does the LPG vapour-phase filter need replacing?
Yes — every 15,000-20,000 km or once a year. A clogged vapour-phase filter restricts gas flow, causing engine hesitation and power loss. The cost of the filter is minimal compared to gas injector repair.
What is the difference between liquid-phase and vapour-phase filters?
The liquid-phase filter is mounted before the reducer/vaporiser and cleans liquid LPG of tank sediment. The vapour-phase filter sits after the vaporiser and captures oily particles generated during gas evaporation. Both elements should be replaced at the same time.
Will skipping the petrol filter change damage the engine?
A clogged filter restricts fuel flow, resulting in power loss, hesitation under acceleration and hard starting. Prolonged low fuel pressure can also damage the fuel pump running dry.