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Raypak RPSFP18 - User Manual

Raypak RPSFP18
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E󰀨ective: 09-15-20
Replaces: 01-15-20
P/N 241830 Rev 4
INSTALLATION
AND OPERATION
MANUAL
Models
RPSFP16, RPSFP18,
RPSFP21, RPSFP181,
RPSFP211
IMPORTANT SAFETY INSTRUCTIONS.
READ AND FOLLOW ALL INSTRUCTION.
SAVE THESE INSTRUCTIONS.
NOTE: The instructions in this manual are for the use of qualied individuals specially trained and experienced
in the installation and maintenance of this type of equipment and related system components. Installation and
service personnel are required by some states to be licensed. Persons not qualied shall not attempt to install,
service, or maintain this equipment.
This manual should be maintained in legible condition and kept adjacent to the sand ltration or in a safe place
for future use.
SAND
FILTRATION
COMBO

Questions and Answers

  • A
    Alice BlevinsSep 3, 2025
    Why is sand coming out of the Raypak RPSFP18 Water Filtration Systems waste line?
    • G
      Gregory ElliottSep 4, 2025
      Sand coming out of the waste line in Raypak Water Filtration Systems may be due to a pump flow rate that's too high, lifting sand too high during backwash. Adjust the flow rate or change the pump as needed.
  • M
    manuelbrandtSep 18, 2025
    What causes high Raypak RPSFP18 pump pressure?
    • H
      Heather ShafferSep 18, 2025
      High pump pressure in Raypak Water Filtration Systems can result from a discharge valve or inlet fittings closed too much, requiring readjustment or replacement. If the return lines are too small, re-plumb with a larger pipe diameter. Dirty filters also contribute to high pressure, so clean the filter.
  • C
    Caitlin DavisSep 16, 2025
    What causes low Raypak Water Filtration Systems pump capacity?
    • N
      Nathan SanchezSep 16, 2025
      Low pump capacity in Raypak Water Filtration Systems can occur if a valve in the suction or discharge line is partly closed, so open or replace the valve. A partly plugged suction or discharge line requires clearing the obstruction. If the suction or discharge line is too small, re-plumb with a larger pipe diameter. A plugged basket in the skimmer or hair and lint strainer needs cleaning. A dirty filter requires cleaning, and a clogged impeller requires pump disassembly.
  • J
    Jorge GloverSep 14, 2025
    Why is there leakage of water at the Raypak RPSFP18 shaft?
    • W
      walkerashleySep 14, 2025
      If there's leakage of water at the shaft of your Raypak Water Filtration Systems, the shaft seal likely requires replacement.
  • D
    Dawn HardingSep 12, 2025
    What causes abnormal loss of Raypak RPSFP18 pool water?
    • E
      ewilkinsonSep 12, 2025
      If you observe an abnormal loss of pool water with Raypak Water Filtration Systems, it could be due to a leak inside the control valve, which needs re-tightening or replacement. Also, inspect, repair, or replace any leaks from the pool or PVC piping.
  • A
    Amanda DiazSep 12, 2025
    Why Raypak RPSFP18 motor overheats (circuit breaker trips)?
    • C
      csmithSep 12, 2025
      If your Raypak Water Filtration Systems pump overheats and the circuit breaker trips, low voltage may be the cause, and you should call an electrician. If the motor windings are connected to the wrong voltage on dual-voltage models, call an electrician. Inadequate ventilation may also be the problem, so relocate the pump.
  • M
    Michelle JohnsonSep 9, 2025
    Why are there air bubbles at the Raypak Water Filtration Systems inlet fittings?
    • C
      calvinhollandSep 9, 2025
      If you notice air bubbles at the inlet fittings of your Raypak Water Filtration Systems, it could be due to air leaking into the suction line at connections or the valve stem, requiring a plumber. The cover gasket of the hair and lint strainer may need cleaning. Also, check for a low water level in the pool and refill it.
  • O
    Olivia AllenSep 7, 2025
    Why Raypak Water Filtration Systems pump does not reach full speed?
    • B
      Brian WuSep 7, 2025
      If your Raypak Water Filtration Systems pump does not reach full speed, low voltage may be the issue, and you should call an electrician. Also, ensure the pump is connected to the correct voltage by calling an electrician.
  • A
    Andre BurtonSep 5, 2025
    Why is there low pressure in my Raypak RPSFP18 Water Filtration Systems filter?
    • N
      Nicholas DavisSep 5, 2025
      Low pressure in your Raypak Water Filtration Systems filter can be caused by an incorrectly set multiport control valve, which requires re-assembly. If the pump flow rate is too slow, check the speed and control valves. An air leak in the pump suction requires checking the seals and tightening as needed.
  • D
    Daniel Cook MDAug 20, 2025
    Why is my Raypak RPSFP18 Water Filtration Systems pool water cloudy?
    • A
      Anthony MurphyAug 20, 2025
      Cloudy pool water in Raypak Water Filtration Systems can result from a dirty sand bed needing backwashing, incorrect sand needing replacement, algae build-up from poor water chemistry (adjust chlorine), or a calcified sand bed due to poor water chemistry (adjust pH balance). Heavy swimmer usage may require more frequent backwashing. An incorrect pump flow rate may require adjustment or pump replacement. Short backwashing cycles should be lengthened, and undersized backwash lines should be enlarged.

Summary

Warnings and Hazard Definitions

Important Safety Instructions

Detailed Safety Instructions

Entrapment Prevention

Details on preventing suction hazards in pools and spas.

Suction Outlet Covers

Requirements for suction outlet covers, including testing and certification.

Number of Suction Outlets Per Pump

Guidelines on the minimum number and spacing of suction outlets.

Water Velocity Limits

Maximum water velocity limits for suction fittings and pipes.

Outlet Cover Testing and Certification

Requirements for suction outlet covers to be tested and certified.

Fittings Recommendations

Recommendations on using fittings to minimize flow restriction and avoid air traps.

Installation Guide

Pump Installation Requirements

Requirements for pump installation, wiring, and connections.

Pump Assembly Steps

Step-by-step guide for assembling and connecting the pump.

Filter Assembly Details

Tools and consumables needed for sand filter installation.

System Start-Up Procedures

General Maintenance Schedule

Troubleshooting Common Issues

Filter Troubleshooting

Common issues encountered with the sand filter and their solutions.

Pump Troubleshooting

Common problems with the pump and recommended actions.

Overview

This document is an installation and operation manual for Raypak Sand Filtration Combo models RPSFP16, RPSFP18, RPSFP21, RPSFP181, and RPSFP211. It provides comprehensive instructions for the safe installation, operation, and maintenance of these swimming pool filter systems.

Function Description:

The Raypak Sand Filtration Combo is designed to extract suspended particles (dirt) from pool water, maintaining water clarity. The system consists of a sand filter and a centrifugal pump. The pump circulates pool water through the sand filter, where a special filter sand traps and collects particles. The filtered water is then returned to the pool. The system also supports backwash operations to clean the filter sand by reversing water flow, flushing trapped debris into a waste line. Some pump models offer dual-speed operation (high and low speed) for energy efficiency and varied performance needs.

Important Safety Instructions:

The manual emphasizes critical safety warnings, including:

  • DANGER: Immediate hazards that can cause severe personal injury, death, or substantial property damage if ignored.
  • WARNING: Hazards or unsafe practices that could cause severe personal injury, death, or substantial property damage if ignored.
  • CAUTION: Hazards or unsafe practices that could cause minor personal injury or product or property damage if ignored.
  • CAUTION (without alert symbol): Potentially hazardous conditions that could cause minor personal injury or product or property damage if ignored.
  • NOTE: Special instructions on installation, operation, or maintenance.

Key safety points include:

  • Always read and follow all warnings and instructions to prevent severe injury, death, or property damage.
  • Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life.
  • Installers, pool operators, and owners must read all instructions before using the sand filter.
  • Serious bodily harm or death can result if the filter and pump combo is not installed and used correctly.
  • High-pressure release from the sand filter can cause severe injury or major property damage; always release all pressure before working on the filter.
  • Before working on the filter: stop the pump, open the air release valve, and release all pressure.
  • Risk of electrical shock: more than one disconnect switch may be required to de-energize equipment.
  • The filter and pump combination is intended for swimming pool applications.
  • Comply with all state and local codes regulating pool and spa construction, installation, and operation.
  • Children must be closely supervised when using this product.
  • Do not increase pump size beyond the maximum flow rate stated on the drain cover.
  • For non-single-family dwellings, a clearly-labeled emergency switch must be provided, accessible within 5 ft (1.52 m) of the filter.
  • Do not use extension cords for pump connection; use a properly located outlet.
  • Do not bury electrical cords; place them to avoid contact with lawnmowers, trimmers, or tripping hazards.
  • A pool or spa pump must be installed by a qualified professional in accordance with the National Electrical Code and local ordinances.
  • Pumps are not a substitute for properly installed and secured pool drain covers (ANSI/ASME A112.19.8 approved anti-entrapment drain cover required).
  • DANGER: ELECTROCUTION OR ELECTRICAL SHOCK RISK. Disconnect electricity before working on the pump.
  • Never work on the pump while it is running or powered.
  • A suitable ground fault interrupter (GFCI) should always be installed at the power supply source.
  • DANGER: Hazardous suction can trap hair and body parts, causing severe injury or death; do not block suction.
  • Elevated water temperature can be hazardous (never exceed 104°F/40°C in spas).
  • Replace damaged electrical cords immediately.
  • The unit must be mounted to the base in accordance with installation instructions.
  • Entrapment Prevention: The system must include at least two suction outlets connected to the pump when running. Maximum water velocity through suction fittings must not exceed 1.5 ft (.5 m) per second.
  • All suction outlets must have screw-fastened, listed/certified covers (ANSI/ASME A112.19.8).
  • Provide at least two hydraulically-balanced main drains, with covers, for each circulating pump suction line, with centers at least 3 ft (.9 m) apart.
  • Fittings restrict flow; use the fewest possible fittings (but at least two suction outlets) and avoid air traps.
  • Pool cleaner suction fittings must conform to IAPMO standards.
  • The filter operates under high pressure; air in the system can cause the lid or control valve to separate, leading to injury or damage.
  • Failure to operate the filter system or inadequate filtration can cause poor water clarity, obstructing visibility and leading to injury or death. Never swim in a pool with poor water clarity.
  • NEVER run the pump dry! Fill the pump with water before starting the motor.
  • Do not block pump suction! Children using the pool must always have close adult supervision.
  • Always turn the pump off before changing valve positions to prevent damage to the control valve.
  • CAUTION: Allowing water to freeze in the system will cause damage.
  • CAUTION: The Multiport Valve should be left in the "Winterize" position during shutdown to prevent damage to the valve diverter seal.

Important Technical Specifications:

The manual provides a table of specifications for different combo models:

Combo Model Filter Model Pump Model Power (HP) Speed Max Operating Pressure, PSI (bar) Max Flow Rate Pump + Filter, GPM (LPM) Turnover Rate, Gal. (L) (2/4/6 Hours) Valve Port Filter Dia., in (mm), "B" Silica Height, in (mm), "C" Silica 16/30* Weight, lb (kg)
RPSFP16 RPSF16 RPAGP75 0.75 Single 28 (2) 50 (187) 6000 (22680) / 12000 (45360) / 18000 (68040) 1.5" 15.7 (399) 6.9 (175) 77 (35)
RPSFP18 RPSF18 RPAGP100 1 Single 28 (2) 63 (237) 7560 (28577) / 15120 (57154) / 22680 (85731) 1.5" 17.7 (450) 8.3 (211) 99 (45)
RPSFP21 RFSF21 RPAGP150 1.5 Single 28 (2) 68 (258) 8160 (30845) / 16320 (61690) / 24480 (92535) 1.5" 20.7 (526) 9.3 (235) 209 (95)
RPSFP181 RPSF18 RPAGP102 1 Dual 28 (2) 63 (237) 7560 (28577) / 15120 (57154) / 22680 (85731) 1.5" 17.7 (450) 8.3 (211) 99 (45)
RPSFP211 RFSF21 RPAGP152 1.5 Dual 28 (2) 68 (258) 8160 (30845) / 16320 (61690) / 24480 (92535) 1.5" 20.7 (526) 9.3 (235) 209 (95)

*Suggested silica weight is for reference only and based on recommended filter media (16/30 Mesh Silica Sand / Silica #20 (0.5 - 0.8mm diameter)).

Usage Features:

  • Filter Operation: Water enters through a valve, passes evenly through the sand filter, trapping particles, and exits through the bottom, up the standpipe, through the valve, and back to the pool.
  • Backwash: Reverses water flow to flush trapped particles from the sand bed into a waste line.
  • Rinse: Settles the sand bed after backwashing and carries remaining loose dirt to the waste line.
  • Waste: Pumps excess water directly from the pool to the waste pipe, bypassing the filter. Useful for high water levels or vacuuming heavy debris.
  • Recirculate: Circulates water directly back to the pool, bypassing the filter. Useful for chemical distribution without filtration.
  • Closed: Prevents water flow through the tank, used for maintenance.
  • Pump Models: Constant speed pumps operate continuously. Dual-speed pumps offer high speed for vacuuming, quick filtering, and priming, and low speed for quiet operation and energy savings (60% based on equal circulated water).
  • Priming Pump: Essential to fill the pump with water before starting to prevent damage.

Maintenance Features:

  • Regular Cleaning: The sand filter requires regular backwashing and rinsing to maintain clean, safe, and healthy swimming water. The frequency depends on pool size, bather usage, and environmental conditions.
  • Pressure Gauge Monitoring: Backwash when the pressure gauge reading is 8-10 PSI higher than the initial "clean" pressure.
  • Pump Strainer and Skimmer Baskets: Clean regularly to prevent damage to the pump and ensure proper operation.
  • Trap Basket Cleaning: Stop the pump, close gate valves, release pressure, unscrew the trap lid, remove and clean the strainer basket, clean and inspect the O-ring, and replace the lid.
  • Filter Winterizing: Drain all water from the pump, system equipment, and piping. Remove drain plugs and store them. Keep the motor covered and dry. Alternatively, remove the pump and motor and store indoors in a warm, dry location. Set the multiport valve to "Winterize" position to prevent damage to the diverter seal.
  • Chemical Cleaning: Address algae, calcification, and sanitation issues as they affect filter efficiency.
  • Troubleshooting Guide: Provides solutions for common problems like sand in the pool, cloudy water, filter leaks, pump not starting, low pump capacity, and high/low pressure.

Installation Requirements:

  • Place the filter on a level concrete slab or firm ground.
  • Locate the filter for convenient access to piping connections, control valve, and service.
  • Pour filter sand media into the tank, ensuring the internal pipe is capped and centered.
  • Assemble the filter control valve into the tank neck, aligning the center pipe and tightening clamps.
  • Screw in the pressure gauge.
  • Install the pump as close as possible to the pool, preferably 20" (0.5 m) below water level, in a dry, well-ventilated area away from direct sunlight, on a hard, level surface with drainage.
  • Bolt the pump onto the platform.
  • Connect suction and discharge pipes to the pool.
  • Wire the pump motor according to the wiring diagram and local/National Electrical Code requirements, ensuring proper grounding and bonding.
  • Allow for gate valves in suction and discharge piping.
  • Ensure adequate access for servicing.

Warranty:

Raypak offers a Limited Warranty to the original owner for above-ground swimming pool cartridge filter systems or sand filter systems.

  • Applicable Warranty Period (Unregistered): 90 days from the Effective Date (date of original installation or 30 days after purchase, not exceeding one year from manufacture date), parts only.
  • Extended Warranty Period (Registered): One year from the Effective Date if registered within 90 days of installation in a single-family residential dwelling.
  • Exclusions: Warranty does not cover travel/labor/shipping costs, systems moved from original installation, improper installation, altered/removed rating plates or serial numbers, unauthorized modifications or accessories, failure to properly install/operate/maintain, damage from abuse/act of nature/accident/fire/flood/freeze/lightning, damage from connected system control devices, or performance problems from improper sizing/electrical issues.
  • Claim Process: Notify dealer immediately with proof of purchase, model, serial number, and date of installation. Obtain proper authorization PRIOR to any repairs. Raypak reserves the right to inspect defective systems.

Raypak RPSFP18 Specifications

General IconGeneral
BrandRaypak
ModelRPSFP18
CategoryWater Filtration Systems
LanguageEnglish

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