This video is all about how electrical relays are used on secondary pump heating systems. They stop back feeding and allow us to closely control what components receive a live supply according to what components are calling for one. I'll also be having a look through some of your comments!

🚀 LEARN PLUMBING ONLINE IN MY STRUCTURED COURSE (50% Before March): http://www.learnplumbingonline.com
🛠 AMAZON TOOL STORE: http://www.amazon.co.uk/shop/plumberp...
🥾 10% Off my workboots + workwear Use Plumberparts10: https://www.bigboots.co.uk/discount/p...
👓 10% Off Safestyle Sunglasses Use PLUMBER10: https://safestyle.com.au/?ref=PLUMBER10

Learn Plumbing Online is perfect for future apprentices, homeowners who want to understand and tackle more plumbing jobs in the home, handymen who keep turning down the odd plumbing job and more. With practical follow along video lessons and discussion board you can boost your knowledge in my amazing trade. Sign up now: http://wwwlearnplumbingonline.com

**VISIT OUR SPONSORS**
http://www.traderadiators.com | https://www.stuart-turner.co.uk

#plumberparts #plumbing #centralheating