Drain Plug Assy, Waterway Crystal Water, W/O-Ring, Old Style|400-6621
$5.09
| Manufacturer part number | 400-6621 |
| UPC (GTIN) | 806105414748 |
| Returns | 30-day returns – see our returns policy |
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💧 Drain Plug Assembly, Waterway Crystal Water, W/O-Ring, Old Style
Made by Waterway Plastics, manufacturer part number 400-6621. 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 | 400-6621 |
| Catalog description | Drain Plug Assy, Waterway Crystal Water, W/O-Ring, Old Style |
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| Waterway Plastics | 400-6610 |
| Waterway Plastics | 500-5310 |
| Waterway Plastics | 505-2030 |
Exploded parts diagrams: This part is shown as item #28 on the DE Filter, Waterway, Crystal Water; item #15 on the Cartridge Filter, Waterway, Crystal Water exploded parts diagrams.
🔧 DE 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 |
|---|---|
| – | DE Grid Set, Unicel, 48 sqft, 7 Full + 1 Half |
| – | Split Nut, Waterway DE Filter/Heaters, 2-1/2", PVC |
| – | Split Nut, Waterway DE Filter/Heaters, 2-1/2", PVC, Bagged |
| – | _570-0036-07 |
| – | _570-0048-07 |
| – | Grid DE,SET, Pleatco, 11" x 30" for 60sqft,(7 Full + 1 Half) |
| – | Grid DE,SET, Pleatco, 11" x 24" for 48sqft,(7 Full + 1 Half) |
| – | Grid DE,SET, Pleatco, 11" x 18" for 36sqft,(7 Full + 1 Half) |
| – | DE Grid Set, Pentair/Hayward, (7+1) 30" for 60 sqft Filters |
| – | DE Grid Set, Pentair/Hayward, (7+1) 24" for 48 sqft Filters |
| – | DE Grid Set, Pentair/Hayward, (7+1) 18" for 36 sqft Filters |
| 33 | 16-270-W015K33 |
| 32 | 16-270-W015K32 |
| 31 | Gasket, Waterway CrystalWater, 2-1/2", Bulkhead Fitting |
| 30 | Bulkhead Fitting, Waterway CrystalWater, 2-1/2" |
| 29 | O-Ring, Buna-N, 3-1/4" ID, 3/16" Cross Section, Generic |
| 28 | Drain Plug Assy, Waterway Crystal Water, W/O-Ring, Old Style ◀ this part |
| 27 | Tank Body, Waterway CrystalWater |
| 26 | Elbow, Waterway CrystalWater, 2-1/2", Long |
| 25 | O-Ring, 2-9/16" ID, 3/32" Cross Section, Generic |
| 24 | 16-270-W015K24 |
| 23 | 16-270-W015K23 |
| 22 | 16-270-W015K22 |
| 21 | 16-270-W015K21 |
| 20 | Manifold, Waterway CrystalWater, with Air Relief |
| 19 | Manifold Nut, Waterway CrystalWater |
| 18 | Air Relief, Waterway CrystalWater |
| 17 | Clamp Wrench, Waterway CrystalWater |
| 16 | Clamp Spring Assembly, Waterway CrystalWater Filters |
| 15 | O-Ring, Waterway Crystal Water, Tank Body |
| 14 | 16-270-W015K14 |
| 13 | 16-270-W015K13 |
| 12 | 14-270-1121 |
| 11 | Air Relief Valve Plunger, Waterway CrystalWater |
| 10 | Air Relief Valve Spring, Waterway CrystalWater |
| 9 | 16-270-W015K9 |
| 8 | Handle, Waterway CrystalWater, Air Relief Valve |
| 7 | 16-270-W015K7 |
| 6 | 16-270-W015K6 |
| 5 | Air Relief Body, Waterway CrystalWater |
| 4 | Rubber Boot, Waterway CrystalWater, Pressure Gauge |
| 3 | 16-270-W015K3 |
| 2 | Bezel Assembly, Waterway CrystalWater, Pressure Gauge |
| 1 | 16-270-W015K1 |
🔧 Exploded diagram and parts
This part belongs to the DE Filter, Waterway, Crystal Water assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
Grid DEs
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Split Nut, Waterway DE Filter/Heaters, 2-1/2", PVC, Bagged | 400-5271B | In stock | $17.64 | Add to cart |
 |
Grid DE, SET, Pleatco, 11" x 30" for 60sqft, (7 Full + 1 Half) | PFS3060 | Available to order | $202.20 | |
 |
Grid DE, SET, Pleatco, 11" x 24" for 48sqft, (7 Full + 1 Half) | PFS2448 | Available to order | $274.78 | |
 |
Grid DE, SET, Pleatco, 11" x 18" for 36sqft, (7 Full + 1 Half) | PFS1836 | Available to order | $129.66 |
Complete multiport valves
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Multiport Valve, Waterway Side Mount, 2" Slip, with Unions | WVD002 | Available to order | $296.44 | Add to cart |
 |
Multiport Valve, Waterway Side Mount, 2"fpt, w/Unions | WVD001 | 4 in stock | $221.59 | Add to cart |
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Tool, Button-Hook, Drain Plug Wrench, Stainless Steel | DPW-150 | 23 in stock | $78.24 | Add to cart |
 |
Silicone Based Lubricant 1oz 00150 | 00150 | 343 in stock | $5.26 | Add to cart |
| Brand | Waterway Plastics |
|---|---|
| H Part# | 17-270-1220 |