Reducer, Waterway, 2″ to 1-1/2″|421-4071
$3.28
| Manufacturer part number | 421-4071 |
| UPC (GTIN) | 806105086716 |
| Returns | 30-day returns – see our returns policy |
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💧 Reducer, Waterway, 2″ to 1-1/2″
Made by Waterway Plastics, manufacturer part number 421-4071. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Waterway Plastics |
| Manufacturer part number | 421-4071 |
| Catalog description | Reducer, Waterway, 2″ to 1-1/2″ |
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| Lasco | 437-251 |
Exploded parts diagrams: This part is shown as item #14a on the Cartridge Filter, Waterway, Crystal Water; item #6 on the Waterway 2-1/2″ PVC Slide Valve; the Cartridge Filter, Waterway, Pro Clean Plus exploded parts diagrams.
🔧 Cartridge Filter, Waterway, Crystal Water – exploded parts diagram
The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Cartridge Filter, Waterway Crystal Water, 325 sqft, 112 GPM |
| – | Cartridge Filter, Waterway Crystal Water, 425 sqft, 150 GPM |
| – | Cartridge Filter, Waterway Crystal Water, 525 sqft, 150 GPM |
| 15 | Drain Plug Assy, Waterway Crystal Water, W/O-Ring, Old Style |
| 14h | Gasket, Waterway CrystalWater, 2-1/2", Bulkhead Fitting |
| 14g | O-Ring, Buna-N, 3-1/4" ID, 3/16" Cross Section, Generic |
| 14f | Bulkhead Fitting, Waterway CrystalWater, 2-1/2" |
| 14e | O-Ring, 2-3/4" ID, 1/8" Cross Section, Generic |
| 14d | Tailpiece, Waterway Crystal Water, 2-1/2", w/O-Ring Groove |
| 14c | Union Nut, Waterway Crystal Water, 2-1/2" |
| 14b | Reducer, Waterway, 2-1/2" to 2" |
| 14a | Reducer, Waterway, 2" to 1-1/2" ◀ this part |
| 14 | Bulkhead Assembly, Waterway Crystal Water |
| 13 | 16-270-W017K13 |
| 12 | Elbow Assembly, Waterway Crystal Water, with O-ring |
| 11 | O-Ring, 2-1/2" ID, 1/8" Cross Section, Generic |
| 10 | Intake Diffuser, Waterway Crystal Water |
| 9 | Manifold, Waterway Crystal Water |
| 8 | 16-270-W017K8 |
| 7 | 16-270-W017K7 |
| 6 | Cartridge Manifold Plug, Waterway Crystal Water |
| 5 | O-Ring, Waterway Crystal Water, Tank Body |
| 4a | Clamp Wrench, Waterway CrystalWater |
| 4 | Clamp Spring Assembly, Waterway CrystalWater Filters |
| 3 | 16-270-W017K3 |
| 2 | 16-270-W017K2 |
| 1k | 14-270-1121 |
| 1j | Air Relief Valve Plunger, Waterway CrystalWater |
| 1i | Air Relief Valve Spring, Waterway CrystalWater |
| 1h | 16-270-W017K1H |
| 1g | Handle, Waterway CrystalWater, Air Relief Valve |
| 1f | Air Relief Screw, Waterway CrystalWater, with O-ring |
| 1e | 16-270-W017K1E |
| 1d | Air Relief Body, Waterway CrystalWater |
| 1c | Rubber Boot, Waterway CrystalWater, Pressure Gauge |
| 1b | Pressure Gauge, Waterway, 1/4"mpt, 0-60psi, Back Mount |
| 1a | Bezel Assembly, Waterway CrystalWater, Pressure Gauge |
| 1 | 16-270-W017K1 |
🔧 Exploded diagram and parts
This part belongs to the Cartridge Filter, Waterway, Crystal Water assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
Show the other 31 parts on this diagram we stock
Complete cartridge filters
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Cartridge Filter, Waterway Crystal Water, 325 sqft, 112 GPM | 570-0325-07 | Available to order | $1305.53 |
| Brand | Waterway Plastics |
|---|---|
| H Part# | 17-270-1065 |