Testing And Certification - STA-RITE AR204-L 3/4 HP Owner's Manual

“ar” series bronze pumps with integral trap self-priming

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Table Of Contents

Table of Contents

IAPMO Certified

Anti-entrapment

Cover or Suction Fitting,

screw-fastened to

Main Drain Sump

Suction Outlet

(Main Drain)

Figure 1 – Recommended pump suction layout.

Suction Outlets Per Pump (Figure 1, Page 4)

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 1, below).

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 1).

More than one pump can be connected to a single suction line as long as the

requirements above are met.

Water Velocity

The maximum water velocity through the suction fitting or cover for any suc-

tion outlet must be 1.5 feet per second unless the outlet complies with the lat-

est ASME/ANSI Specification for Suction Fittings For Use in Swimming Pools,

Spas, Hot Tubs, and Whirlpool Bathtub Applications. In any case, do not ex-

ceed 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 sec-

ond 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

ASME/ANSI Specification for Suction Fittings For Use in Swimming Pools,

Spas, Hot Tubs, and Whirlpool Bathtub Applications.