Andrews
Andrews Cross Head Tapping Screw Z423
Cross head tapping screw Z423 for Andrews Water Heaters Fastflo and hot water appliances.
At a glance
- Also known as 1824330
Showing prices
£4.25
£3.54 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 Andrews Z423 is a cross head tapping screw from Andrews Water Heaters. It is a fastening component listed for use across the Andrews Fastflo and hot water spares range.
Signs this part needs replacing
- The cross head is rounded or cammed out, so the driver slips
- Visible corrosion or rust on the head or threads
- Threads are stripped and the screw no longer tightens
- The screw is missing from a panel or cover it should secure
- The screw works loose again shortly after tightening
Before you order
- Confirm your appliance model against the fitment list above
- Check that the part number Z423 matches the screw being removed
- Check how many screws the job requires before ordering
Compliance
| Alternative numbers | 1824330 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWH42 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWH56 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WH42 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WH56 | — | — | — |
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.
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.