MODULAR BUILD-UP MODULAR BUILD-UP REDUCED MAINTENANCE COSTS. Easy maintenance. All components can be easily reached for maintenance/repair (simply) by removing the cover. Applied to: PW-H28 PW-H50 PW-H100 Benefits Easy access to internal components by removing the cover. Pump, valve and motor can be easily reached for fast maintenance and/or repair operations. Sturdy structure with high resistance to thermal shocks, weather conditions, and corrosion from chemicals.