How to Identify the Correct Heatrae Sadia Spare Part (Engineer Guide)

How to Identify the Correct Heatrae Sadia Spare Part (Engineer Guide)

A practical guide for plumbers, electricians, heating engineers and property professionals.

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Heating engineer working on heating system with floating spare parts above her head with text about identifying correct spares

Introduction

Finding the correct Heatrae Sadia spare part can be challenging — especially when dealing with older cylinders, units with worn labels, or installations that have been previously modified. Selecting the wrong part not only delays repair work but can also lead to safety issues, system inefficiency or repeat callouts.

At Heatraq, we specialise in genuine Heatrae Sadia and Baxi components, and we’re committed to helping engineers and property professionals identify the correct replacement first time. Whether you're replacing an immersion heater, thermostat, valve, gasket or accessory, this guide will walk you through the most reliable methods to pinpoint the exact part you need.

Start With the Data Plate (Appliance Identification Label)

Every Heatrae Sadia unit — whether a Megaflo cylinder, Supreme boiler, Hotflo unit or point-of-use water heater — is fitted with a data plate.

This label normally includes:

  • Model name
  • Capacity (litres)
  • Part code or assembly code
  • Serial number
  • Electrical rating
  • Manufacturing date

Why this matters:

The model and manufacturing year directly influence which spare parts are compatible. Heatrae Sadia parts vary between:

  • Megaflo Eco
  • Megaflo Eco Plus
  • Megaflo Slimline
  • Megaflo SolaReady
  • Supreme (boiling water units)
  • Hotflo
  • Multipoint
  • Point-of-use water heaters like Express & Streamline

Even a small variation — such as a cylinder revision or immersion heater length — can change which parts fit.

Tip:

Take a clear photo of the data plate and keep it with your job notes.

Heatraq can identify compatible parts just from the photo.

Check the Existing Part for a Number or Stamp 

Many Heatrae Sadia parts have part numbers printed or stamped directly onto the component, especially: 

If the number is visible, matching it is straightforward. 

Common formats you’ll see: 

  • 9560xxxxx (immersion heaters, thermostats, solenoids) 
  • 95xxxxxx (older immersion heaters) 
  • 77xxxxx (gaskets, seals, plates) 
  • AQ** prefixes (some valves) 

If you’re unsure, send Heatraq the part number — we can confirm whether it’s still current and what the genuine replacement is. 

Identify the Cylinder Type by the Immersion Heater Fittings 

When labels are missing or worn, you can often identify the model from the immersion heater design. 

For example: 

  • Megaflo Eco / Eco Plus 
  • Usually uses titanium elements 
  • Lower and upper immersion heaters differ 
  • 2¼" BSP fittings 
  • Often associated with part numbers like:
    • 95606988 (titanium lower) 
    • 95606913 (element plate assemblies) 

Older Heatrae Sadia Vented Units 

  • Copper or Incoloy immersion elements 
  • Different flange shapes/gasket profiles 

Supreme / Speediboil / PHS Units 

  • Solenoid valves, tap actuators and PCB modules differ between generations 
  • Element lengths and wattages vary 

If you can describe the heater length, flange type or material, Heatraq can usually narrow it down quickly. 

Compare the Part to the System Location (What It Does) 

If the model label is unreadable, work backwards: 

Is the part located on: 

  • The top of the cylinder → Upper immersion heater 
  • The bottom of the cylinder → Lower immersion heater 
  • The cold inlet group → Blending valve / Check valve / PRV 
  • The side access plate → Gasket or seal kit 
  • The control panel → Tap headwork, solenoid, stat or switch 
  • The expansion pipe → Expansion vessel or air gap component 

Knowing the part’s location and function can be enough to identify the exact replacement.

Measure It (Size, Length, Thread Type, Voltage)

This is especially useful for:

  • Gaskets
  • Immersion heater lengths
  • Valves
  • Expansion vessels
  • Thermostats

Key measurements that help Heatraq identify parts:

  • Element length (in inches or mm)
  • Thread size (usually 2¼" BSP for Megaflo)
  • Voltage (230V)
  • Wattage (2kW or dual 3kW)
  • Gasket diameter/profile
  • Valve rating (6 bar PRV, 3 bar T&P valve, etc.)

Even if you don't know the model name, these measurements can pinpoint the correct part.

Take Photos — Heatraq Will Identify the Part for You

One of the simplest ways is to send us:

  • A photo of the data plate (if readable)
  • A photo of the part itself (installed or removed)
  • Any visible stamps or engravings
  • The area where the part is fitted
  • The cylinder or appliance as a whole

Our team can cross-reference this with:

  • OEM part catalogues
  • Manufacturer’s documentation
  • Previous product revisions
  • Common part failures by model

We will always aim to ensure you get the correct genuine replacement first time.

Common Heatrae Sadia Parts We Can Help Identify

We regularly help customers identify:

  • Upper & lower immersion heaters
  • Titanium Megaflo heaters
  • Immersion heater gasket kits
  • Thermostats (cut-outs, rods, dual stats)
  • Pressure relief valves (e.g., 6 bar PRVs)
  • Expansion vessels
  • Inlet control groups
  • Solenoid valves
  • Tap headworks
  • Gaskets & seals
  • Supreme / Speediboil components
  • Multipoint water heater parts

If it’s part of a Heatrae Sadia system, we can identify it for you.

Why Engineers Choose Heatraq for Part Identification

  • Genuine OEM parts only — no pattern substitutes
  • Accurate compatibility checks
  • Fast delivery for urgent jobs
  • Expanding inventory of Heatrae Sadia and Baxi components
  • Engineer-friendly support — send us photos, part numbers or cylinder details
  • No pressure sales — we only recommend the correct part

 Need Help Identifying a Part?

You can contact Heatraq with:

  • Model details
  • Part number
  • Photos
  • System description

We’ll help confirm the exact OEM part you need and ensure it fits safely and correctly

This article was researched and prepared in collaboration with CarisBrook Digital

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