Had a new Combi boiler fitted from a conventional system and have been losing pressure daily.

Boiler- Glo Worm compact manufactured by Vaillant

Please note- I am not a professional plumber. My plumber who fit the system was unwell and so I had to take it up with the manufacturer who gave me some advice to add a leak sealer. This is a step by step process.

In this video I have used
- Sentinel Leak Sealer
- HILKA Pro craft oil suction gun

Good luck everyone.

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