Go-Kit 50 Seal Replacement Kit – Premier 355/225 MK2 Pump Series
Professional Grade Pump Seal Kit
Product Overview
As a retailer of hot tub spare parts, I offer this specialized Go-Kit 50 seal replacement kit, engineered specifically for Premier MK2 series pumps. This comprehensive kit provides complete sealing solutions for both 355 and 225 MK2 models.
Compatible Models
- Premier 355 MK2
- Premier 225 MK2
- Related MK2 series variations
Technical Details
The Go-Kit 50 (H Part# 90-423-3018) has been precision-engineered to meet exact Premier specifications, ensuring perfect compatibility with supported MK2 pump models.
Exploded parts diagram: This part is shown on the Premier Spring Water 225 MK2 Series Pump exploded parts diagram.
🔧 Premier Spring Water 225 MK2 Series 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 50, Premier 355/225 MK2 Pump ◀ this part |
| 10b | 34-451-W007K10B |
| 10a | 34-451-W007K10A |
| 9 | 34-451-W007K9 |
| 8 | Screw, Premier, 8-32 x 5/8" |
| 7 | Drain Plug, Premier 320/325/225, 3/8" |
| 6 | O-Ring, 1/2" ID, 3/32" Cross Section, Generic |
| 5 | Volute, Premier 200, MKII |
| 4 | 34-451-W007K4 |
| 3 | 34-451-W007K3 |
| 2 | O-Ring, Buna-N, 5-1/4" ID, 3/32" Cross Section, Generic |
| 1 | Adapter, Premier 225, MKII |
Specifications Table
| Specification | Detail |
|---|---|
| Part Number | H Part# 90-423-3018 |
| Part Type | O-ring Kit |
| Cross Section | Multiple (Kit Contents) |
| Application Type | Pump |
| Manufacturer Compatibility | Premier |
| Primary Models | 355 MK2, 225 MK2 |
Kit Contents
This complete seal kit contains all necessary O-rings and seals required for a thorough pump maintenance service. Each component is manufactured to meet original equipment specifications.
Installation Overview
Professional installation is recommended for optimal performance. The kit provides all necessary components for a complete seal replacement service.
Quality Features
- Precision-engineered components
- High-grade materials
- Designed for extended service life
- Complete system compatibility
- Professional-grade quality
Note: This kit is designed as a direct replacement for original Premier MK2 pump components.











