Ariston
Ariston Isolating Valve 3/4 Inch Return 999582
Ariston 999582 isolating valve with a 3/4 inch connection for the central heating return on compatible Ariston gas boilers.
At a glance
- Also known as ISOLATING-VALVE-34-RETURN, 1577720
Showing prices
£29.96
£24.97 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 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 999582 is an isolating valve with a 3/4 inch connection, fitted on the central heating return of compatible Ariston gas boilers. It allows the return circuit to be isolated for servicing or component replacement without draining the full system.
Signs this part needs replacing
- Weeping or dripping from the valve body or spindle
- Valve handle turns but does not isolate the return
- Seized or stiff operation that will not fully close
- Corrosion or scale around the connection
- System pressure drops when the valve is operated
Before you order
- Confirm your boiler model and serial number against the fitment list above
- Check the GC number where shown on your appliance data badge
- Verify the connection size is 3/4 inch and that the valve is for the return side
- Isolate and drain the relevant circuit before fitting
Compliance
| Barcode / EAN | 5411692343569 |
|---|---|
| Alternative numbers | ISOLATING-VALVE-34-RETURN, 1577720 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ACO 27 MFFI GPL | 47-116-34 | 47-116-34 | — | — |
| ARISTON ACO 27 MFFI MET | 47-116-34 | 47-116-34 | — | — |
| ARISTON ACO 27 RFFI SYSTEM GPL | 41-116-09 | 41-116-09 | — | — |
| ARISTON ACO 27 RFFI SYSTEM MET | 41-116-09 | 41-116-09 | — | — |
| ARISTON ACO 32 MFFI GPL | 47-116-35 | 47-116-35 | — | — |
| ARISTON ACO 32 MFFI MET | 47-116-35 | 47-116-35 | — | — |
| ARISTON ACO 32 RFFI SYSTEM GPL | 41-116-10 | 41-116-10 | — | — |
| ARISTON ACO 32 RFFI SYSTEM MET | 41-116-10 | 41-116-10 | — | — |
| ARISTON ACO 35 HP MFFI UK | 47-116-35 | 47-116-35 | — | — |
| ARISTON ARISTON ACO 27 MFFI | — | — | — |
Showing 10 of 65 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 — ACO 27 MFFI GPL (GC 47-116-34), ACO 27 MFFI MET (GC 47-116-34), ACO 27 RFFI SYSTEM GPL (GC 41-116-09), ACO 27 RFFI SYSTEM MET (GC 41-116-09), ACO 32 MFFI GPL (GC 47-116-35), ACO 32 MFFI MET (GC 47-116-35), ACO 32 RFFI SYSTEM GPL (GC 41-116-10), ACO 32 RFFI SYSTEM MET (GC 41-116-10)
manualmanualARISTON appliance manual — ACO 35 HP MFFI UK (GC 47-116-35)
manualmanualARISTON appliance manual — ECOCOMBI 27 MFFI LPG EDITION 1 (OCT 2002) (GC 47-116-23), ECOCOMBI 27 MFFI LPG EDITION 2 (SEPT 2004) (GC 47-116-23), ECOCOMBI 27 MFFI NG EDITION 1 (OCT 2002) (GC 47-116-23), ECOCOMBI 27 MFFI NG EDITION 2 (SEPT 2004) (GC 47-116-23), ECOSYSTEM 27 RFFI EDITION 1 LPG (OCT 2002) (GC 41-116-08), ECOSYSTEM 27 RFFI EDITION 1 NG (OCT 2002) (GC 41-116-08), ECOSYSTEM 27 RFFI EDITION 2 LPG (SEPT 2004) (GC 41-116-08), ECOSYSTEM 27 RFFI EDITION 2 NG (SEPT 2004) (GC 41-116-08)
manualmanualARISTON appliance manual — MICROCOMBI 28 MFFI LPG EDITION 1 (APR 2003) (GC 47-116-24), MICROCOMBI 28 MFFI NG EDITION 1 (APR 2003) (GC 47-116-24)
manualmanualARISTON appliance manual — MICROGENUS 23 MFFI LPG EDITION 5 (MAR 2004) (GC 47-116-14), MICROGENUS 23 MFFI NG EDITION 5 (MAR 2004) (GC 47-116-14), MICROGENUS 27 MFFI LPG EDITION 5 (MAR 2004) (GC 47-116-15), MICROGENUS 27 MFFI NG EDITION 5 (MAR 2004) (GC 47-116-15)
manualmanualARISTON appliance manual — MICROGENUS 24 MFFI HE UK NG (GC 47-116-37), MICROGENUS 28 MFFI HE UK LPG (GC 47-116-38), MICROGENUS 32 MFFI HE UK NG (GC 47-116-39)
manualmanualARISTON appliance manual — MICROGENUS II 24 MFFI UK LPG, MICROGENUS II 24 MFFI UK MET (GC 47-116-25), MICROGENUS II 28 MFFI UK LPG, MICROGENUS II 28 MFFI UK MET (GC 47-116-26), MICROGENUS II 31 MFFI UK LPG (GC 47-116-27), MICROGENUS II 31 MFFI UK MET (GC 47-116-27)
manualmanualARISTON appliance manual — 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 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 3 (FEB 2004) (GC 41-116-05), MICROSYSTEM 15 RFFI LPG EDITION 4 (SEPT 2004) (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)
manualmanualARISTON appliance manual — MICROSYSTEM 21 RFFI LPG EDITION 2 (JAN 2004) (GC 41-116-06), MICROSYSTEM 21 RFFI LPG EDITION 3 (SEPT 2004) (GC 41-116-06), MICROSYSTEM 21 RFFI NG EDITION 2 (JAN 2004) (GC 41-116-06), MICROSYSTEM 21 RFFI NG EDITION 3 (SEPT 2004) (GC 41-116-06), MICROSYSTEM 28 RFFI LPG EDITION 2 (JAN 2004) (GC 41-116-07), MICROSYSTEM 28 RFFI LPG EDITION 3 (SEPT 2004) (GC 41-116-07), MICROSYSTEM 28 RFFI NG EDITION 2 (JAN 2004) (GC 41-116-07), MICROSYSTEM 28 RFFI NG EDITION 3 (SEPT 2004) (GC 41-116-07)
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