Ideal
Ideal HIU Pump Indirect Units 177638
Ideal 177638 HIU pump for indirect units, circulating water in the heat interface unit's primary circuit. Alternative number 1180503.
At a glance
- Part type: HIU pump
- Also known as 1180503
£672.94
£560.78 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 Ideal 177638 is a HIU (heat interface unit) pump supplied for indirect units. It is manufactured by Ideal and sits within the Ideal Commercial parts range, where it circulates water around the unit's primary circuit to move heat from the source into the dwelling's heating and hot water systems. The pump is a serviceable component, so it is replaced when circulation drops or the motor fails rather than repaired on site.
Signs this part needs replacing
- No heating or hot water at the outlets even though the unit is calling for heat
- The pump body runs hot, hums loudly or vibrates without circulating water
- Poor flow rate or a widening temperature difference between flow and return across the unit
- Water weeping from the pump body, gland or mating faces
- Repeated lockouts or circulation-related fault codes on the HIU controls
Before you order
- Confirm the appliance model and serial number against the compatibility list before ordering
- Check the pump currently fitted for the number 177638 or 1180503 so the correct unit is matched
- Inspect the seals and gaskets on removal and renew them if they are compressed or perished
- This part is not a gas-carrying component
Mechanical
| Part type | HIU pump |
|---|
Compliance
| Manufacturer part number (MPN) | 177638 |
|---|---|
| Commodity code | 8413 70 30 00 |
| GPC classification | Central Heating Replacement Parts/Accessories |
| Alternative numbers | 1180503 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| IDEAL COMMERCIAL IDEAL COMMERCIAL PARTS | — | — | — |
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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No 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.