
Pressure Gauge Baxi Roca RS 20 20 Ref. 122155350
The Roca RS 20 20 Pressure Gauge, reference 122155350, is a device that measures and controls the pressure of the circuit in the boiler. If it malfunctions, you will notice incorrect readings that may cause the boiler to lock due to a false lack of pressure or poor temperature regulation. This pressure gauge is compatible with models from the Roca RS-20/20, Roca R-20/20, and Roca R-30/30 ranges, among others. It is recommended to replace it when the readings are not accurate or the boiler has pressure issues.
VAT included
Consult via WhatsAppBaxi Roca boilers compatible with reference 122155350
Pressure gauge with reference 122155350. 11 verified compatibilities: RS-20/20 and RS-20/20F.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca RS-20/20 | Baxi Roca RS-20/20 | Contrasted |
| Baxi Roca RS-20/20F | Baxi Roca RS-20/20 | Contrasted |
| Baxi Roca RS-20/20T | Baxi Roca RS-20/20 | Contrasted |
| Baxi Roca RSI-20/20 | Baxi Roca RS-20/20 | Contrasted |
| Baxi Roca R-20/20 | Baxi Roca R-20/20 | Contrasted |
| Baxi Roca R-20/20F | Baxi Roca R-20/20 | Contrasted |
| Baxi Roca R-20/20P | Baxi Roca R-20/20 | Contrasted |
| Baxi Roca R-20/20T | Baxi Roca R-20/20 | Contrasted |
| Baxi Roca R-30/30 | Baxi Roca R-30/30 | Contrasted |
| Baxi Roca R-30/30F | Baxi Roca R-30/30 | Contrasted |
| Baxi Roca R-30/30P | Baxi Roca R-30/30 | 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 reference 122155350 is the part 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 122155350. 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 pressure gauge 122155350 resolves.
The manometer shows the pressure of the boiler circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The needle does not move even if you bleed air or recharge pressure in the circuit.
Cause: The internal bourdon is jammed or blocked, which usually happens when scale enters through the brass fitting.
Bleed the highest radiator properly and check if the circuit responds; if the water moves normally but the needle does not, the fault is with the manometer.
- 02
There is a water leak dripping from the thread where the pressure gauge is connected.
Cause: The gasket or brass fitting has degraded over time and no longer seals properly against the body of the boiler.
Check if tightening the fitting slightly with a wrench, without forcing it, stops the leak; if it continues to drip after tightening, the problem may be just with the gasket.
- 03
The plastic body is cracked or broken and the fitting is no longer securely attached.
Cause: The plastic ages with the heat and vibrations of the boiler and ends up cracking around the thread.
Check if the crack affects only the outer casing or also the internal mechanism; with the broken body, it is common that no repair is possible.
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.
Data sheet for the pressure gauge Baxi Roca 122155350
- Catalogue reference
- 122155350
- Brand
- Baxi Roca
- Type of part
- Pressure gauges & aquastats
- Units in stock
- 6 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- 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.
- Pressure gauge
- 0-4 bar
- Body
- Black plastic
- Connection fitting
- Threaded, brass







