Ariston
Ariston By-Pass 996046
Ariston 996046 by-pass component for Microcombi, Microsystem, Microtec, Ecosystem, EST, NEW R2 and Excalibur gas boilers.
At a glance
- Part type: by-pass
- Also known as 1576618
£13.67
£11.39 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Ariston 996046 is a by-pass component for Ariston gas boilers, listed by the manufacturer under the description "BY-PASS - FUGAS". It sits within the boiler's hydraulic circuit, where the by-pass maintains flow through the appliance as system demand changes. It is used across a number of Ariston Microcombi, Microsystem, Microtec, Ecosystem, EST, NEW R2 and Excalibur appliances.
Signs this part needs replacing
- Boiler short-cycling or frequent burner shutdowns as heating demand falls
- Overheating, or a widening flow and return temperature differential
- Noise from the boiler or pipework when thermostatic radiator valves close down
- Poor circulation or uneven heating when only a few radiators are open
- Flow or temperature related fault codes and lockouts
Before you order
- Confirm the boiler model and, where shown, the GC number against the fitment list.
- On Microcombi 27 MFFI, check the serial number — this part applies from serial number 2320309500001.
- Check the appliance edition (Edition One, Two, Three or Four) as listed.
- Confirm the number 996046 matches the existing component or the manufacturer's parts list.
Compliance
| Barcode / EAN | 5411692410742 |
|---|---|
| Alternative numbers | 1576618 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ACO 35 HP MFFI UK | 47-116-35 | 47-116-35 | — | — |
| ARISTON ARISTON MICROCOMBI 27 MFFI - EDITION ONE - FROM SERIAL No 2320309500001 | — | — | — | |
| ARISTON ARISTON MICROCOMBI 27MFFI - EDITION TWO - FROM SERIAL No 2320309500001 | — | — | — | |
| ARISTON ECOSYSTEM 27 RFFI EDITION 2 LPG (SEPT 2004) | 41-116-08 | 41-116-08 | — | — |
| ARISTON ECOSYSTEM 27 RFFI EDITION 2 NG (SEPT 2004) | 41-116-08 | 41-116-08 | — | — |
| ARISTON EST 23 MFFI - LPG EDITION 3 (26 AUG 2005) | — | — | — | |
| ARISTON EST 23 MFFI - NG EDITION 3 (26 AUG 2005) | — | — | — | |
| ARISTON EXCALIBUR 100 LPG EDITION 1 (JAN 2004) | — | — | — | |
| ARISTON EXCALIBUR 100 NG | — | — | — | |
| ARISTON EXCALIBUR 100 NG EDITION 1 (JAN 2004) | 47-116-31 | 47-116-31 | — | — |
Showing 10 of 35 compatible appliances.
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.
ARISTON appliance manual — ACO 35 HP MFFI UK (GC 47-116-35)
manualmanualARISTON appliance manual — 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 — 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)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.