NEW S LE T T ER
KEMPER FLOW SPLIT TER - IL CODE APPROVALS
MERCYHEALTH HOSPITAL AND MEDICAL CENTER – CRYSTAL LAKE
BEMIS - MASTERSPEC LISTINGS
APOLLO - WRITING THE SPEC
SIZING & OP TIONS
S A L E S
G R O U P
231 S FRONTAGE RD.
BURR RIDGE, IL 60527
8925 N PRAIRIE POINTE
PEORIA, IL 61615
Mercyhealth Hospital and Medical Center – Crystal Lake
The $105 million facility will be home to a hospital with private inpatient and intensive care suites, surgery suites,
emergency care and diagnostic services, as well primary and specialty care physician offices.
KEMPER FLOW SPLITTERS BEING INSTALLED
The new Mercyhealth facility currently under construction will have 70 of the Kemper Flow Splitters installed in the potable
hot water distribution piping to help in recirculation, flow and distribution close to the outlets within the rooms. Installed
sizes will range from ½” to 2”.
Benefits of the Flow-Splitter in a hot water installation:
• less hot water return pipework
• reduces energy consumption
• reduces installation and operating costs
• increases user comfort
• maintains targeted hot water temperatures throughout the installation
• Lead and dezincification-free brass alloy material in compliance with the Uniform Plumbing Code (UPC) and National
Plumbing Code of Canada
The Kemper Flow Splitter is a lifetime building product that does not require maintance or servicing. It is like any other
circuit setter or check valve that is installed in the building.
People need to understand that the Kemper Flow-Splitter is a non-serviceable valve and does not need to be
maintained. As simple as that. They can believe what they want but our experience and scientific data prove
The service life through 15 years of installations (well over ½ million valves currently in use) and relentless cycle
testing has been estimated to be 50 years (see previously attached quality document).
It is often confused with but is not a check valve, and the quality document provided alludes to this and to the
fact that the Flow-Splitter insert cartridge does not include the same stress points of a check valve where
sealing against flow direction is critical. Although the cartridge is manufactured from similar materials, it does not
experience the continuous stress forces that a check valve does. This makes the cartridge even more robust
within its specific application and function. As a result, there are no identified critical stresses, no reported
deterioration and no loss of function resulting from normal use. For this reason, we have determined that the
Flow-Splitter will not require maintenance, service, or replacement.
STATE OF ILLINOIS PLUMBING CODE
The Kemper Flow Splitter is approved for use in the State of Illinois.
Below we have the approval letter from Brian Cox.
KEMPER FLOW SPLITTER IDPH APPROVAL LETTTER
In addition, we have approvals from Illinois Code bodies to support the installation of Flow Spitters without unions as
it considered the same as a circuit setter, etc…
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CODE EXPLANATION BELOW
Illinois Code Section 890.350
Unions may be used in the drainage and venting system when accessibly located above ground. Unions
shall be installed in a water supply system within 5 feet of regulating equipment, water heaters, water
conditioning tanks, water conditioning equipment, pumps, and similar equipment which may require service
by removal or replacement. Where small equipment may be unscrewed, only one union shall be required.
I would not consider this a regulating piece of equipment, no different than a circuit setter. Hence, unions are
Pete Prehn IDPH Certified Plumbing Inspector/Code Consultant
Illinois Department of Public Health – Rockford & West Chicago Region
Standards and Approvals: NSF/ANSI 61 & NSF/ANSI 372 • IAPMO/IGC 302
AN INNOVATIVE OPTION FOR DESIGNING HOT & COLD
WATER DISTRIBUTION PIPING LAYOUTS
Kemper Flow Splitter
www.inlandsalesgroup.com Brian Yelton, CPMR
peoria: 309.693.7950 burr Ridge: 630.850.7775
APRIL 2022 12080 ASSE CERTIFIED 2
UNDERSTANDING AND WRITING A SPEC FOR AN APOLLO BACKFLOW DEVICE BY SIZE AND OPTIONS
Apollo manufactures a full line of RPZ devices for you to spec and install in all your buildings. We will
focus today on domes�c potable water, but Apollo does get into waterworks and ﬁre divisions also
Apollo is a company based out of Charlo�e, NC with domes�c plants and distribu�on facili�es
throughout the United States, with local Stock at Inland Sales Warehouses in Burr Ridge and Peoria IL.
We oﬀer RPZ’s from 1/2'” thru 12”
The Apollo® model rp4a/rplf4a lead free* & non-lead free series reduced pressure backﬂow preventers
provide maximum protec�on against backsiphonage or backpressure from substances that are
hazardous to the potable water supply. The top accessed modular check valve cartridges provide 5 Y E
captured springs, replaceable seats and reversible silicone seat discs. This made in America assembly A R
features ball valves with stainless steel handles and trim as standard and carries the ﬁve-year Apollo®
Understanding the Numerology ½”-2” Small Diam product
PART NUMBER MATRIX
4A [X] 2 X X X X X
Y-STRAINER SIZE SHUT-OFF VALVES OPTIONS (CAN BE
4A - NON-LEAD FREE 0 - STANDARD 3 - 1/2” A2 - W/ BALL VALVES (STANDARD) F - SAE THREADED TEST COCKS (STANDARD 1/ 2”)
4ALF - LEAD FREE 1 - WITH Y-STRAINER 4 - 3/ 4" A4 - W/UNION BALL VALVES (3/4” - 2”) L - LEVER HANDLE (3/ 4” & 1” ONLY)
(SHIPPED LOOSE) 5 - 1" LL - LOCKING LEVER HANDLES
6 - 1-1/4" P - PUSH CONNECTION (FACTORY INSTALLED)
7 - 1-1/2" PR - PRESS CONNECTION (FACTORY INSTALLED)
8 - 2"
4A 215 A4LL = 1” Reduced Pressure Backﬂow Preventer with strainer, union ball valves and locking lever handles
• ASSE 1013-2011
• CSA B64.4
• NSF/ANSI 61 water quality
• NSF/ANSI 372 lead free
• federal public law 111-380
• AWWA C511
• approved by the Founda�on for Cross- Connec�on Control and Hydraulic Research at the
University of Southern California
• horizontal installa�on approvals on 1/2”
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Understanding the 2 ½” to 12” Numerology
4ALF 2 X X 0 X XX
Y-STRAINER SIZE SHUT-OFF VALVES OPTIONS
4ALF - LEAD FREE STANDARD 0 - STANDARD 9 - 2-1/2” 2 - NRS FLANGE X NRS FLANGE D - DOMESTIC ASSEMBLY
1 - W/ Y-STRAINER 0 - 3" 3 - OS&Y FLANGE X OS&Y FLANGE
(SHIPPED LOOSE) A - 4" 4 - OS&Y FLANGE X MONITORED (MON.) BUTTERFLY VALVE GROOVE †
C - 6" 6 - OS&Y FLANGE X POST INDICATOR FLANGE
E - 8" 7 - OS&Y FLANGE X OS&Y GROOVE
G - 10" 8 - OS&Y GROOVE X OS&Y GROOVE
H - 12” 9 - MON. BUTTERFLY VALVE GROOVE X MON. BUTTERFLY VALVE GROOVE †
10 - OS&Y FLANGE X POST INDICATOR GROOVE
11 - NRS GROOVE X NRS GROOVE
12 - NRS FLANGE X NRS GROOVE
13 - POST INDICATOR FLANGE X MON. BUTTERFLY VALVE GROOVE †
14 - POST INDICATOR FLANGE X POST INDICATOR FLANGE
16 - MON BUTTERFLY VALVE GROOVE X POST INDICATOR FLANGE †
17 - POST INDICATOR FLANGE X OS&Y GROOVE
18 - OS&Y GROOVE X POST INDICATOR GROOVE
19 - MON. BUTTERFLY VALVE GROOVE X POST INDICATOR GROOVE
EXAMPLE: 4ALF 20A 07 = 4” size Lead Free 20 - POST INDICATOR FLANGE X OS&Y FLANGE
Reduced Pressure Asse mbly with OS&Y 21 - POST INDICATOR GROOVE X OS&Y GROOVE
flanged inlet x OS&Y gro oved outlet shut- 22 - POST INDICATOR GROOVE X MON. BUTTERFLY VALVE GROOVE †
off valves. 23 - MON. BUTTERFLY VALVE GROOVE X OS&Y FLANGE
• sizes 2-1/2” – 12”: AWWA C511
• sizes 2-1/2” – 12”: ASSE 1013-2011, CSA B64.4, FM, IAPMO, UL*, cUL*
• NSF/ANSI 61 water quality (2-1/2” - 12”)
• NSF/ANSI 372 lead free (2-1/2” – 12”)
• approved by the founda�on for Cross- connec�on control and hydraulic research at the university
of southern california (2-1/2” - 12”)
*UL and cUL installations must include indicating-type shut-off valves
I. DESCRIPTION AND OPERATION
The Reduced Pressure Principle (RP) device consists of two independently-ac�ng, spring-loaded check
valves, together with a hydraulically dependent, mechanically independent pressure diﬀeren�al relief
valve, located in the zone between the check valves. Two resilient seated shut-oﬀ valves and four test
cocks complete the assembly. The ﬁrst check is designed to maintain a minimum of 5 psi across the
check valve. The second check is designed to maintain a minimum of 1 psi across the check valve during
normal opera�on. The relief valve operates on a diﬀeren�al pressure. Supply pressure on the upstream
side of the ﬁrst check valve acts against the diaphragm to close the relief valve during normal opera�on.
In the event of back-pressure, the relief valve will open to maintain the pressure in the “zone” at least 2
psi less than the inlet pressure. The ﬂowing and no ﬂow condi�ons are illustrated in Figures 1 and 2. A
minimum supply pressure of 20 psig is normally required to fully shut the relief valve and open both
A. The RP must be installed in an accessible loca�on to facilitate periodic ﬁeld tes�ng and maintenance.
B. The loca�on selected should have adequate drainage for relief valve discharge. The device should
never be placed where it may be submerged in standing water.
C. Flush all upstream piping thoroughly to remove foreign ma�er prior to installing the device.
D. The device must be installed in the horizontal posi�on. A clearance between the lower most por�on
of the device and ﬂood grade or ﬂoor should be provided for ease of maintenance.
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E. When shut-oﬀ valves are provided separately, they should be installed with a test cock on the
upstream side of the inlet shut-oﬀ valve.
F. A�er installing the assembly and with downstream or #2 shut-oﬀ valve closed, pressurize the device
and bleed ALL air through test cock #4. Then open #2 shut-oﬀ valve.
THE APOLLO ADVANTAGE
The Inland Sales Team is here to help. Let us know how we can assist in you specs and always
remember Apollo for your next RPZ!
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APRIL 2022 5