Backflow Prevention Specialists
Captain Backflow provides professional backflow prevention for commercial premises across the UK. From risk assessment to RPZ valve installation and annual testing, we make sure your water system protects the public supply and meets water regulations.
What is backflow prevention?
Backflow is the unwanted reverse flow of water from a property's system back into the public mains supply. It can carry contaminants, chemicals or bacteria that pose a serious health risk. Backflow prevention devices stop this by allowing water to flow in one direction only.
The level of protection required depends on the fluid category risk at your premises. For higher-risk commercial sites, an RPZ valve is often the correct solution. Captain Backflow assesses your risk, recommends the right protection and installs and tests it to the required standard.
Our backflow prevention services
Complete protection from risk assessment through to compliant installation and testing.
Risk assessment
We assess your premises and confirm the fluid category and correct protection level.
RPZ installation
Supply and fit RPZ valve assemblies for category 4 and 5 risk premises.
Annual testing
Compliant annual testing of installed backflow prevention devices.
Device selection
Advice on the right device for your risk, from double check valves to RPZ.
Our approach
We identify the risk, install the right protection and keep it compliant.
- 1
We assess the risk at your premises and confirm the fluid category.
- 2
We recommend the correct backflow prevention device for your risk level.
- 3
We quote for supply and installation, with no obligation to proceed.
- 4
We fit the device to the correct standard and test it before handover.
- 5
We set up your annual testing reminder to keep it compliant.
Specialist focus
RPZ and water compliance is all we do.
Compliant records
Documentation for your water supplier and insurer.
Digital & manual
Calibrated digital and proven manual testing.
Install & maintain
Supply, fit, test and service RPZ valves.
Why backflow prevention matters
Without proper protection, your premises can put the public water supply at risk.
Backflow can carry contaminants, chemicals or bacteria into the public mains supply.
Water suppliers require appropriate backflow protection for commercial premises.
The correct device depends on your fluid category risk — we help you get it right.
Annual testing confirms your protection is still working as intended.
Backflow prevention across the UK
We provide backflow prevention services for commercial premises nationwide. Select your city for local information.
North West England
North East England
London
South East England
East of England
Request a free quote
Tell us your postcode and the number of valves. We will confirm availability and pricing.
Backflow Prevention — your questions
Need backflow prevention at your premises?
Get a free risk assessment and quote from the UK's water compliance specialists.