arrow_down arrow Cash in hand Certificate cross house people_2 people Percent Phone Plus Phone and Tablet phone Pound Facebook Google Plus Instagram LinkedIn Twitter YouTube


Water treatment products and services for lifetime protection of heating and hot water systems.


Sentinel offer water treatment products and services that provide lifetime protection for heating and hot water systems.

Through the free TradeHelp Buying Group, you can access additional cash back on their chemicals and filters paid directly into your bank account.

For purchases made from Wolseley, City Plumbing Supplies, Graham, Plumbase or James Hargreaves we can set up automatic reporting for your cashback claims.

 For purchases from all other merchants and suppliers please send proof of purchase to [email protected] or use the handy ‘Document Upload’ tool in the app. 

Sentinel On Site Training

Domestic Water Treatment Training for Professionals

As part of the new Partner Programme, Sentinel now offers on-site domestic training for installers and industry professionals.

The Introduction to Water Treatment course is completely free and, upon completing the training, you have the opportunity to become Sentinel Certified; giving you access to exclusive benefits.

For further information on how to book your place click below!