⚠️ Worcester Bosch Greenstar Leaking? Replace Flow Manifold (Left Hand Block) 🔧

Описание: In this video, we’re replacing a leaking left-hand flow manifold on a Worcester Bosch Greenstar Junior boiler 🛠️. I walk you through the full step-by-step repair, sharing practical tips along the way to make your job easier 💡.

🔍 What’s Covered:
💧 Draining the boiler via the magnetic filter (not internal drain-off!)

🔧 Pro tip: Changing the expansion vessel core

🚰 Turning off mains water & gas supply ✅

🔥 Gas pipe & condensate trap removal

🧴 Lubricating O-rings with WD-40 for easier disassembly

📋 Step-by-step manifold removal – which pipes to remove in what order

🧼 Prepping and fitting the new manifold with silicone grease

🧪 Refilling, purging air, and testing the system

✅ Final checks (off-camera) and casing reassembly

🚪 A random bit: fixing the customer’s airing cupboard door!

🛻 Loading up the van & a quick job recap

This might be my first time replacing a left-hand block (done the right-hand many times), so you’ll get an honest, real-world walkthrough from start to finish.

👉 Like, Comment & Subscribe for more heating & plumbing content from the front line! 🔧🔥
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💎 Who Are The Plumbing Doctors 💎

Waseem is the Owner/ Lead Engineer and Curtis is the Apprentice. Plumbing Doctors specialise in Domestic Plumbing, Heating & Gas Work. Waseem decided to focus on creating YouTube Videos during the first lockdown in 2020 as he wanted to share his knowledge in this industry to help anyone who wanted to learn during the hard times.

We are located in Coventry, West Midlands, UK.