Horizon is now utilizing the AS568A O-Ring standard used by the O-Ring industry in order to bring a standardized approach to the pool and spa industry. The current active Horizon part number for an o-ring is 90-423-5xxx, where xxx represents the AS568A designation. This designation ranges from -001 thru -932, in order of smallest to largest first by cross section then by diameter.
Exploded parts diagram: This part is shown as item #2 on the Pent Am Prod Americana II Pump exploded parts diagram.
🔧 Pent Am Prod Americana II Pump – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Go-Kit 43, AP Maxim/Americana II/Power Glas Pumps |
| 14 | Seal Plate, Pent Am Prod Americana II, w/o Handle |
| 13 | Seal Plate Elbow, Pentair American Products Americana II |
| 12 | Vertical Bracket, Pent Am Prod Maxim, Americana II |
| 11 | Nut, Pentair American Products Maxim, Americana II, 10-24 |
| 10 | Lock Washer, Pent Am Prod Maxim, Americana II, 10-24 |
| 9 | 34-110-W010K9 |
| 8 | 34-110-W010K8 |
| 7 | O-Ring, Buna-N, 4-1/2"ID, 1/8"CrossSection, Generic |
| 6 | Screw, Pent Am Prod Maxim, Americana II, 10-24 x 7/8" |
| 5 | O-Ring, Pentair American Products Americana II, Seal Plate |
| 4 | Drain Plug, Pentair American Products Americana II, 1/4" |
| 3 | Basket, Pump, OEM AmProd/Pentair Maxim Americana II |
| 2 | O-Ring, 4-7/8"ID, 1/4"Cross Section, Generic ◀ this part |
| 1 | Trap Lid, Pent Am Prod Maxim/Americana II, Biguanide Res |














