Pressure Gauge Boiler E-20 I / M-20 Ref. V7477
The pressure gauge for the boiler E-20 I / M-20 Ref. V7477 measures and controls the pressure of the boiler circuit. If it fails, you may notice incorrect readings, which can cause the boiler to lock out due to a false lack of pressure or not regulate the temperature properly. This pressure gauge is compatible with Cointra E-20 boilers, such as E20I and E20L, as well as the M-20 range, including M20, M20I, and M20L. It is recommended to replace it if you notice that the pressure is not accurately reflected on the gauge.
VAT included
Consult via WhatsAppCointra boilers compatible with reference 7477
Pressure gauge with reference 7477. Five confirmed compatibilities: E20I and E20L.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Cointra E20I | Cointra E-20 | Contrasted |
| Cointra E20L | Cointra E-20 | Contrasted |
| Cointra M20 | Cointra M-20 | Contrasted |
| Cointra M20I | Cointra M-20 | Contrasted |
| Cointra M20L | Cointra M-20 | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if the part number 7477 is the one for your boiler.
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 7477. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the manometer 7477 resolves.
The manometer shows the pressure of the boiler circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
There is water dripping or a damp ring right at the base where the pressure gauge screws into the boiler.
Cause: The threaded joint can lose tightness over time due to wear of the gasket or the pressure gauge body itself.
Dry the area well, tighten the fitting carefully, and check after a few minutes if moisture reappears.
- 02
The needle does not move no matter what happens, neither when bleeding nor when refilling the system.
Cause: The internal mechanism of the pressure gauge can get stuck over time and stop transmitting the actual pressure to the needle.
Bleed a radiator for a moment and see if the needle reacts; if it doesn't drop at all, the pressure gauge is not functioning properly.
- 03
The pressure reading varies greatly from one day to another without you having touched anything in the installation.
Cause: A worn mechanism can give erratic readings even though the actual pressure in the circuit remains stable.
Record the cold pressure for two or three consecutive days; if it varies inconsistently without leaks or bleeding, the pressure gauge is faulty.
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Cointra 7477 pressure gauge data sheet
- Catalogue reference
- 7477
- Brand
- Cointra
- Type of part
- Pressure gauges & aquastats
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Part code
- V7477
- Pressure gauge
- 0-6 bar
Frequently asked questions about the manometer 7477
Does the V7477 manometer work for a M-20 F boiler?
What pressure does the V7477 manometer indicate on the E-20 I?
How do I know if the V7477 manometer is the one for my M-20 I?
When should the pressure gauge of the M-20 L be replaced?
