Ariston
Ariston Gas Valve 999474
Ariston 999474 gas valve for Microsystem 10 RFFI and 15 RFFI boilers, in NG and LPG editions.
At a glance
- Part type: gas valve
- Appliance family: Microsystem 10 RFFI and Microsystem 15 RFFI
- Also known as 1577632
- Gas valve work must be carried out by a competent Gas Safe registered engineer
Showing prices
£197.04
£164.20 ex. VAT · VAT at 20%
Available to order · 3–5 working days
Available to order · 3–5 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Ariston 999474 is a gas valve used on Ariston Microsystem RFFI boilers. It controls the flow of gas to the burner, opening and modulating supply in line with the appliance's demand for heat and hot water. It is listed by the manufacturer for the Microsystem 10 RFFI and Microsystem 15 RFFI ranges.
Signs this part needs replacing
- The boiler fails to light or locks out repeatedly with a gas supply fault
- Flame is unstable, weak or extinguishes shortly after ignition
- Gas valve body shows signs of leakage, corrosion or impact damage
- No modulation of burner output, so the boiler runs at a fixed rate or cycles harshly
- Fault code or diagnostic reading points to the gas valve circuit
Before you order
- Confirm the boiler model is a Microsystem 10 RFFI or Microsystem 15 RFFI
- Check the appliance serial number against the ranges listed above
- Confirm whether the boiler is NG or LPG, as the editions differ
- Gas valve work must be carried out by a competent Gas Safe registered engineer
Compliance
| Barcode / EAN | 5411692337803 |
|---|---|
| Alternative numbers | 1577632 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ARISTON MICROSYSTEM 10 RFFI - FROM SERIAL No 2320021100001 TO SERIAL No 2320024900001 | — | — | — | |
| ARISTON ARISTON MICROSYSTEM 10 RFFI - FROM SERIAL No 2320101600001 TO SERIAL No 2320106400001 | — | — | — | |
| ARISTON ARISTON MICROSYSTEM 15 RFFI - FROM SERIAL No 2320021100001 TO SERIAL No 2320024900001 | — | — | — | |
| ARISTON ARISTON MICROSYSTEM 15 RFFI - FROM SERIAL No 2320101600001 TO SERIAL No 2320106400001 | — | — | — | |
| ARISTON MICROSYSTEM 10 RFFI LPG EDITION 1 (AUG 2000) | 41-116-04 | 41-116-04 | — | — |
| ARISTON MICROSYSTEM 10 RFFI LPG EDITION 2 (FEB 2001) | 41-116-04 | 41-116-04 | — | — |
| ARISTON MICROSYSTEM 10 RFFI LPG EDITION 3 (FEB 2004) | 41-116-04 | 41-116-04 | — | — |
| ARISTON MICROSYSTEM 10 RFFI LPG EDITION 4 (SEPT 2004) | 41-116-04 | 41-116-04 | — | — |
| ARISTON MICROSYSTEM 10 RFFI NG EDITION 1 (AUG 2000) | 41-116-04 | 41-116-04 | — | — |
| ARISTON MICROSYSTEM 10 RFFI NG EDITION 2 (FEB 2001) | 41-116-04 | 41-116-04 | — | — |
Showing 10 of 20 compatible appliances.
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
manual
ARISTON appliance manual — MICROSYSTEM 10 RFFI LPG EDITION 1 (AUG 2000) (GC 41-116-04), MICROSYSTEM 10 RFFI LPG EDITION 2 (FEB 2001) (GC 41-116-04), MICROSYSTEM 10 RFFI LPG EDITION 3 (FEB 2004) (GC 41-116-04), MICROSYSTEM 10 RFFI LPG EDITION 4 (SEPT 2004) (GC 41-116-04), MICROSYSTEM 10 RFFI NG EDITION 1 (AUG 2000) (GC 41-116-04), MICROSYSTEM 10 RFFI NG EDITION 2 (FEB 2001) (GC 41-116-04), MICROSYSTEM 10 RFFI NG EDITION 3 (FEB 2004) (GC 41-116-04), MICROSYSTEM 10 RFFI NG EDITION 4 (SEPT 2004) (GC 41-116-04)
manualmanualARISTON appliance manual — MICROSYSTEM 15 RFFI LPG EDITION 1 (AUG 2000) (GC 41-116-05), MICROSYSTEM 15 RFFI LPG EDITION 2 (FEB 2001) (GC 41-116-05), MICROSYSTEM 15 RFFI LPG EDITION 3 (FEB 2004) (GC 41-116-05), MICROSYSTEM 15 RFFI LPG EDITION 4 (SEPT 2004) (GC 41-116-05), MICROSYSTEM 15 RFFI NG EDITION 1 (AUG 2000) (GC 41-116-05), MICROSYSTEM 15 RFFI NG EDITION 2 (FEB 2001) (GC 41-116-05), MICROSYSTEM 15 RFFI NG EDITION 3 (FEB 2004) (GC 41-116-05), MICROSYSTEM 15 RFFI NG EDITION 4 (SEPT 2004) (GC 41-116-05)
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