2
DYNA-PRO
®
Self-Priming Pool/Spa Pump Installation and User’s Guide
Pump Suction Requirements
The pump suction system must provide protection against the hazard of suction entrapment or hair entrapment/entanglement.
Pump suction is hazardous and can trap and drown or disembowel bathers. Do not use or operate swimming pools, spas, or hot tubs if a
suction outlet cover is missing, broken, or loose. Follow the guidelines below for a pump installation which minimizes risk to users of pools,
spas, and hot tubs.
Suction Outlet Covers
All suction outlet covers must be properly maintained. They
must be replaced if cracked, broken or missing. All suction
outlets must have correctly installed, screw-fastened covers
in place.
Provide at least two hydraulically balanced main drains, with
covers, as suction outlets for each circulating pump suction
line. The centers of the main drains (suction outlets) on any
one suction line must be at least three feet apart.
The system must be built so that it cannot operate with
the pump drawing water from only one main drain (that is,
there must be at least two main drains connected to the
pump whenever it is running – see
Figure 2
). However, if
two main drains run into a single suction line, the single
suction line may be equipped with a valve which will
shut off both main drains from the pump (see
Figure 2
).
More than one pump can be connected to a single suction
line as long as the requirements above are met.
Testing and Certification
Suction outlet covers must have been tested by a nationally
recognized testing laboratory and found to comply with the
latest ANSI/ASME Specifications for Suction Fittings For Use
in Swimming Pools, Spas, Hot Tubs, and Whirlpool Bathtub
Applications.
Water Velocity
The maximum water velocity through the suction fitting or
cover for any suction outlet must not exceed 1.5 feet per
second unless the outlet complies with the latest ANSI/ASME
Specification for Suction Fittings For Use in Swimming Pools,
Spas, Hot Tubs, and Whirlpool Bathtub Applications. In any
case, do not exceed the suction fitting’s maximum designed
flow rate.
If 100% of the pump’s flow comes from the main drain system,
the maximum water velocity in the pump suction hydraulic
system must be six feet per second or less even if one main
drain (suction outlet) is completely blocked. The flow through
the remaining main drain(s) must comply with the latest ANSI/
ASME Specification for Suction Fittings For Use in Swimming
Pools, Spas, Hot Tubs, and Whirlpool Bathtub Applications.
Figure 2
Summary of Contents for STA-RITE DYNA-PRO
Page 15: ...NOTES...
