Walla Walla MP RISER User guide
MP RISER - 6/06
fl ower beds
& shrub areas
optional
pressure
regulation
slopes/
revegetation
MP RISERTM
Application Guide
The MP Riser is an easy-to-use assembly
for connecting the MP Rotator into poly
or PVC systems. It is used in:
· Temporary systems
· Dust control
· Vegetable gardens
· Container nurseries
· Flower beds & shrub areas
· Sprinkler relocation
a
MP Riser
includes:
a MP Rotator
Acme Adapter
b MP Riser
Stake Adapter
c MP Riser
Tubing 36” (91cm)
(comes assembled
to b & d)
d MP Riser Barb
e MP Riser Stake 36” (91cm)
MP Rotator®
(sold separately)
Tie (recommended)
b
c
e
d
See illustration
above
Stake & Tubing
not shown
Advantages of the MP Riser:
· Flexible fiberglass stake
· Easy to use
· Ability to relocate heads
as plant material grows
· Cost-effective
· Reusable
The MP Riser is compatible with the MP
Corner, MP Strips, MP1000s, MP2000s &
MP3000s. Please see chart on the following
page for details.
MP RISER
Acme Adapter (a), Stake Adapter (b), Tubing 36” (91cm) (c), Barb (d), Stake 36” (91cm) (e)
MP RISER INDIVIDUAL COMPONENTS
MP Riser Stake, 36” (91cm) long
MP Riser Tubing, 100’ (30.5 m) coil
MP Riser Stake Adapter — connects MP Riser Tubing to Stake,
quick change Acme Thread base
MP Rotator Acme Adapter — accepts female thread MP Rotator
and connects to MP Riser Stake Adapter
MP Riser Barb — connects MP Riser Tubing to poly tube
MP RISER ACCESSORIES
MP Riser 1/2” Compression Adapter (for PVC) — connects MP Riser Tubing
to PVC system — glue into 1/2” female PVC slip fitting
MP Riser Goof Plug — plugs hole left when MP Riser Barb removed,
insert into poly tube with small steel rod (or dull 16d nail)
MP Riser Acme Shut-Off Cap — shuts off water flow from
MP Riser or MP Regulator
MP Riser Coupler — splices MP Riser Tubing
MP Riser Punch Tool — creates hole for MP Riser Barb
connection to poly tube
MP Riser Stake Installation Tool — protects stake when driving into hard ground
MPR/MPRDC — ACME X ACME (FOR MP RISER MOUNT)
MP Regulator Drain Check (MPRDC) — 30 PSI (2.1 BAR)
MP Regulator Drain Check (MPRDC) — 40 PSI (2.8 BAR)
MP Regulator Drain Check (MPRDC) — 50 PSI (3.5 BAR)
MP Regulator (MPR) — 30 PSI (2.1 BAR)
MP Regulator (MPR) — 40 PSI (2.8 BAR)
MP Regulator (MPR) — 50 PSI (3.5 BAR)
MPR/MPRDC — 1/2” FNPT X ACME (FOR PVC RISER MOUNT)
MP Regulator Drain Check (MPRDC) — 30 PSI (2.1 BAR)
MP Regulator Drain Check (MPRDC) — 40 PSI (2.8 BAR)
MP Regulator Drain Check (MPRDC) — 50 PSI (3.5 BAR)
MP Regulator (MPR) — 30 PSI (2.1 BAR)
MP Regulator (MPR) — 40 PSI (2.8 BAR)
MP Regulator (MPR) — 50 PSI (3.5 BAR)
Assembled MP Riser
MP Riser with Acme Shut-Off Cap
MPRDC with MP Rotator &
Acme Adapter (required)
MP Rotator Acme
Adapter required when
using MPR / MPRDC
(fits ACME outlet)
MPR (gray)
MPRDC (black)
PRESSURE LOSS PER FOOT
OF MP RISER TUBING
MP RISER
PRESSURE LOSS
PSI BAR
GPM
LPM
Installation into Poly Tubing
Punch Hole
1 2 3
Insert Barb Drive Stake
4 5 6
Mount to Stake Install Adapter Install MP Rotator
Installation into PVC
Glue brown com-
pression adapter
into 1/2” PVC slip
fi tting
1 2 3
Cut off Barb Insert Tube
Now proceed with steps 3-6 above. Use MP Riser
Tubing and brown compression adapters to relocate
sprinklers. Consult pressure loss charts at right.
0
1
2
3
4
5
6
7
8
9
10
1.0 2.0 3.0 4.0
0.6
0.5
0.4
0.3
0.2
0.1
2 4 6 8 10 12 14
Installation Information
When installing the MP Riser, additional materi-
als needed are the Stake Installation Tool and the
Punch Tool. If the MP Risers are to be connected to
PVC, the PVC Adapters will also be needed. When
installing the MP Riser Stakes, be sure to wear
eye protection. The MP Riser Stake is fi berglass
and gloves should be worn when handling the
stakes. For installation into poly use 3/4” tubing
or larger.
PSI BAR
LPM
0.075
0.05
0.025
2 4 6 8 10 12 14
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
0.00
0.20
0.40
0.60
0.80
1.00
1.20
GPM
Includes all fi tting
losses & 36” (91 cm)
tubing loss
Loss through
tubing only
connected to poly-tubing
connected to poly-tubing
connected to ½” PVC
connected to ½” PVC
WARRANTY AND DISCLAIMER: Walla Walla Sprinkler Company MP Rotators® are warranted for one year from date of original
sale to be free of defective materials and workmanship when used within the working specifi cations for which the products
were designed and under normal use and service. The manufacturer assumes no responsibility for installation, removal or
unauthorized repair of defective parts. The manufacturer’s liability under this warranty is limited solely to replacement or repair
of defective parts and the manufacturer will not be liable for any crop or other consequential damages resulting from defects
or breach of warranty. This warranty is expressly in lieu of all other warranties, express or implied, including the warranties of
merchantability and fi tness for particular purposes and of all other obligations or liabilities of manufacturer. No agent, employee
or representative of the manufacturer has authority to waive, alter or add to the provisions of this warranty, nor to make any
representations or warranty not contained herein. The seller undertakes no responsibility for the quality of the goods except
as otherwise provided in this contract, and the seller assumes no responsibility that the goods will be fi t for any particular
purpose for which you may be buying these goods, except as otherwise provided in this contract.
This product may be covered by one or more of the following U.S. Patent Nos. 4842201, 4867379, 4898332, 4967961, 5058806,
5288022, 6244521, 6499672, 6651905, 6688539, 6736332, 7032836 and other U.S. Patents pending or corresponding issued or
pending foreign patents.
A subsidiary of Nelson Irrigation Corporation
(A world leader in water application solutions for agriculture)
848 Airport Road
Walla Walla, WA 99362-2271, U.S.A.
Tel: +1 509-525-7660
Fax: +1 509-525-7907
info@mprotator.com
www.mprotator.com
FLOW LIMITS
Do not exceed 5 GPM (18.9 LPM) fl ow. Inlet
pressure must always be at least 5 PSI (0.4 BAR)
higher than the desired, regulated pressure.
FILTRATION REQUIREMENTS
The regulator has small openings in the
seat and plunger area. Debris smaller than
1/16” (1.58 mm) in diameter may easily pass
through the regulator. Larger material and
stringy fi bers can plug inside the regulator
seat area. Access to remove the plug is
gained through the inlet of the regulator.
MPR / MPRDC DIFFERENCES
The MP Regulator (MPR) is normally open.
This means that water passes through the
regulator and sprinkler as the system pres-
surizes. The MP Regulator Drain Check
(MPRDC) is normally closed. As the system
is pressurized the MPRDC remains closed
until the pressure reaches approximately
13 PSI ( 0.9 BAR) below the labeled pressure.
Example: a 40 PSI (2.8 BAR) MPRDC opens at
27 PSI (1.9 BAR) and provides accurate pres-
sure regulation at 45 PSI (3.1 BAR).
Pressure Regulators
MP Regulators (MPR) are designed to accurately deliver a set
outlet pressure when inlet pressures are higher than desired.
The MP Regulator Drain Check (MPRDC) adds a “check valve”
function that prevents low head drainage but without any
incremental pressure loss. MPRDCs also ensure that when the
valve opens, all sprinklers turn on at once and at full radius.
The ACME X ACME models are for the MP Riser. The1/2”
FNPT X ACME models are for 1/2” PVC Risers.
ACME inlet for MP Riser connection,
1/2” FNPT inlet for PVC Riser connection
(pressure +5 psi above regulator psi)
Acme Adapter
(required)
MP Rotator
Acme outlet
OUTLET PRESSURE (PSI & BAR)
INLET PRESSURE (PSI & BAR)
MP REGULATOR PERFORMANCE GRAPH
1 2 3 4 5 6 7
2.1 BAR
2.8 BAR
3.5 BAR
4.1 BAR
MPR (GRAY)
pressure
regulation only
MPRDC (BLACK)
pressure regulation
and drain check
Pressure Options: 30 PSI (2.1 BAR), 40 PSI (2.8 BAR), 50 PSI (3.5 BAR)
Recommended Flow Range: 0.15 GPM (0.6 LPM) to 5 GPM (18.9 LPM)
Maximum Inlet Pressure: 130 PSI (9.0 BAR)
Minimum Inlet Pressure: 5 PSI (0.4 BAR) above regulator pressure
Opening & Closing Pressures for the MP Rotator Regulator Drain Check :
PRESSURE OPTION PRESSURE TO OPEN PRESSURE TO CLOSE HOLD BACK ELEVATION
30 PSI (2.1 BAR) 23 PSI (1.6 BAR) 15 PSI (1.0 BAR) 35 ft. (10.7 M)
40 PSI (2.8 BAR) 28 PSI (1.9 BAR) 19 PSI (1.3 BAR) 44 ft. (13.4 M)
50 PSI (3.4 BAR) 38 PSI (2.6 BAR) 29 PSI (2.0 BAR) 67 ft. (20.4 M)
