This document is an installation and operation manual for Raypak sand filters, specifically models RPSF14, RPSF16, RPSF18, RPSF21, RPSF25, and RPSF28. It provides comprehensive information for qualified individuals on the proper installation, operation, and maintenance of these swimming pool filters.
Function Description
The Raypak sand filter is designed to extract suspended particles (dirt) from pool water, thereby keeping the water clear. It utilizes a special filter sand to trap and collect these particles as water flows through the unit. The filtering action occurs as water enters through a valve on the top of the filter, passes evenly through the sand bed, and then flows out through the bottom side, up through the standpipe, and back into the pool via a valve on the top.
The filter operates under pressure, and its primary function is to maintain water clarity. It does not adjust pH levels or bacterial counts, which are handled by other specialized pool chemistry equipment.
Important Technical Specifications
The manual provides a table of dimensions and sand media requirements for each model:
| Model |
Height in. (mm) A |
Diameter in. (mm) B |
Valve Port Size Inch |
Silica Height in. (mm) C |
Silica 16/30* Weight lb. (kg) |
| RPSF14 |
28.6 (726) |
13.8 (350) |
1.5" |
6.3 (160) |
44 (20) |
| RPSF16 |
29.8 (757) |
15.7 (400) |
1.5" |
6.9 (175) |
77 (35) |
| RPSF18 |
32.0 (814) |
17.7 (449) |
1.5" |
8.3 (210) |
99 (45) |
| RPSF21 |
33.3 (845) |
20.7 (527) |
1.5" |
9.3 (235) |
209 (85) |
| RPSF25 |
37.4 (950) |
24.7 (627) |
1.5" |
11.8 (300) |
319 (145) |
| RPSF28 |
40.2 (1020) |
27.7 (703) |
1.5" |
13.0 (330) |
462 (210) |
*Note: Suggested silica weight with differences in filter media size for reference only.
The filter operates under high pressure, and specific warnings are provided regarding pressure release during servicing. The system uses a 6-way multiport valve (1-1/2") for various functions.
Usage Features
The sand filter is designed for use in swimming pool applications. Its operation involves several modes controlled by a multiport valve:
- FILTER: This is the standard operational position where water flows from the pool, is distributed across the top of the sand bed, filtered, and returned to the pool. This position can also be used for manual vacuuming and cleaning.
- BACKWASH: Used to clean the sand bed when the pressure gauge indicates 8-10 PSI above the clean filter's operation. Water flow is reversed, lifting the sand bed and flushing debris out through the waste pipe. The sight glass helps monitor water clarity during backwash.
- RINSE: Used after backwashing to settle the sand bed and carry any remaining loose dirt through the waste line. This prevents debris from returning to the pool. Rinsing continues until clear water is seen through the sight glass, typically for about half the duration of a backwash cycle.
- WASTE: Allows excess water from the pool to be pumped directly to the waste pipe, bypassing the filter. Useful for high water levels or vacuuming heavy debris.
- RECIRCULATE: Bypasses the filter and circulates water directly back to the pool. Useful for circulating chemicals without filtering or if a leak develops in the filter, allowing continued water circulation while leaks are located.
- CLOSED: Prevents water flow through the tank, useful for maintenance on the filtration system.
The manual emphasizes the importance of turning off the pump before changing valve positions to prevent equipment damage and injury.
Maintenance Features
Regular maintenance is crucial for the sand filter's optimal performance and longevity. The manual outlines several key maintenance aspects:
- Cleaning (Backwash and Rinse): A regular schedule for backwashing and rinsing is essential. The frequency and duration depend on pool size, usage, and environmental conditions. The filter needs cleaning when the pressure gauge reading is 8-10 PSI higher than the initial "clean" pressure.
- Chemical Cleaning: The manual mentions chemical cleaning as a method to address issues like calcified sand beds due to poor water chemistry.
- Winterizing: Instructions are provided for winterizing the system, which involves draining the filter tank and removing the drain cap to prevent water damage from freezing.
- Troubleshooting: A detailed troubleshooting table helps identify and resolve common issues such as sand entering the pool, cloudy pool water, filter leaks, multiport control valve leaks, abnormal water loss, high or low pressure, and air leaks. Solutions range from adjusting flow rates and chemistry to replacing damaged parts.
- Parts Replacement: The manual includes an illustrated parts list with Raypak order numbers for components like the 6-way valve, union and pressure gauge, locking clamp, lateral assemblies, and water drain. This facilitates easy identification and ordering of replacement parts.
- Regular Inspections: The manual recommends checking all gaskets and pressure gauges, inspecting for leaks, and ensuring the multiport valve is correctly positioned.
- Professional Service: For complex issues or to ensure proper maintenance, consulting a qualified pool professional is highly recommended.
The manual also includes important safety warnings, emphasizing the need for qualified individuals to perform installation and service, the dangers of high-pressure release, electrical shock hazards, and the importance of maintaining clear pool water to prevent drowning. It also provides guidelines from the U.S. Consumer Product Safety Commission regarding spa water temperatures and usage.
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