Underdrain Components
swtwater.com Upper Screens, Lower Screens
& Baffle Plate Strainers
SWT’s Basket Distributors are molded of sturdy ABS or polypropylene material and are useful as upper screens or inlet screens, as lower screens or distributors, or as baffle plate strainers. The slotting is configured to allow greater flow with minimal pressure loss.
 
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TECHNICAL SPECIFICATIONS
Materials of construction: ABS, Polypropylene (PP)
ABS maximum recommended operating temperature: 120°F (48°C)
PP maximum recommended operating temperature: 160°F (71°C)
Maximum recommended operating pressure: 150 psi
 
 
SWT's Upper Screen/Diffuser with 3/4-inch Pipe Riser Port
SWT’s Upper Screen/Diffusers can be cemented to a valve or tank head, or fixtured with two 3/32 inch self-tapping screws.
Materials of construction: ABS
Total open area of slots: 1.070 sq.in.
PART NUMBER DESCRIPTION RISER PORT SIZE SLOT SIZE
SM-US813 Upper Screen/Diffuser 13/16 inch
(0.813 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
SM-US105 Upper Screen/Diffuser 3/4 inch
(1.050 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
 
 
SWT's Upper Screen/Diffusers with Twist-n-Lock Connection
SWT’s Upper Screen/Diffusers twist-n-lock onto a valve or tank head.
Materials of construction: ABS
PART NUMBER DESCRIPTION RISER PORT SIZE SLOT SIZE
LC-D1203-01 Upper Screen/Diffuser 13/16 inch
(0.813 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
LC-D1203 Upper Screen/Diffuser 3/4 inch
(1.050 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
LC-D1203-02 Upper Screen/Diffuser 1 inch
(1.320 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
 
 
SWT's Stacked Upper Screen/Diffusers with Twist-n-Lock Connection
SWT’s Stacked Upper Screen/Diffusers twist-n-lock onto a valve or tank head. Constructed of individual ABS segments fastened with stainless steel screws, they have the ability to open up when backwashed, removing any possible fines that might accumulate.
Materials of construction: ABS with stainless steel screws
PART NUMBER DESCRIPTION RISER PORT SIZE SLOT SIZE
LC-D1225-03 Upper Screen/Diffuser,
11-Stack
3/4 inch
(1.050 inch O.D.)
0.007 to 0.010 inch
(0.17 to 0.25 mm)
LC-D1225-05 Upper Screen/Diffuser,
11-Stack
3/4 inch
(1.050 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
LC-D1225-06 Upper Screen/Diffuser,
11-Stack
1 inch
(1.320 inch O.D.)
0.007 to 0.010 inch
(0.17 to 0.25 mm)
LC-D1225-08 Upper Screen/Diffuser,
14-Stack
1 inch
(1.320 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
 
 
SWT's Modular Design Slotted Strainer/Upper Diffuser (LP-L3137508-PP)
SWT’s Slotted Strainer/Upper Diffuser features a modular design which allows it to be quickly disassembled for easy cleaning. Made in USA.
Materials of construction: Polypropylene
Total open area of slots: 9.0 sq.in. (58.06 sq.cm.)
Slot area is 1.4 times 3 inch pipe area
Flow rate: 150 gpm @ 1 psid
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
LP-L3137508-PP Slotted Strainer/Upper Diffuser 3 inch MNPT 0.008 inch
(0.20 mm)
 
 
SWT's Upper Screen/Diffuser or Bottom Distributor Basket with 1-1/2 inch MNPT and 1-1/4 inch FNPT Connection (LP-L150608-PP)
Close-up of Threaded Connection (LP-L150608-PP)
SWT’s Upper Screen/Diffuser or Bottom Distributor Basket features a modular design which allows it to be quickly disassembled for easy cleaning. It's unique dual threaded configuration allows it to be used as either 1-1/2 inch MNPT or 1-1/4 inch FNPT.
Materials of construction: Polypropylene
Flow rate: 48 gpm @ 1.5 psid; 75 gpm @ 3.5 psid
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
LP-L150608-PP Upper Screen/Diffuser
or Bottom Distributor Basket
1-1/2 inch MNPT
or
1-1/4 inch FNPT
0.008 inch
(0.20 mm)
 
 
SWT's Lower Screen with 3-step Collar (SM-MB3)
SWT's Lower Screen with 3/4-inch Pipe Riser Port (SM-MB105)
SWT’s Lower Screen/Distributors are an economical alternative to slotted risers. The pointed end of the cone-shaped basket allows easy insertion into a resin or media bed.
Materials of construction: ABS
Total open area of slots: 1.070 sq.in.
PART NUMBER DESCRIPTION RISER PORT SIZE SLOT SIZE
SM-MB3 Lower Screen with
3-step Collar
13/16 inch
(0.813 inch O.D.)
1/2 inch
(0.840 inch O.D.)
3/4 inch
(1.050 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
SM-MB105 Lower Screen 3/4 inch
(1.050 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
 
 
SWT's Stacked Lower Screens with Socket Connection
SWT’s Stacked Lower Screen/Distributors consists of individual ABS segments fastened with stainless steel screws. They have the ability to open up when backwashed, removing any possible fines that might accumulate on the distributor.
Materials of construction: ABS with stainless steel screws
PART NUMBER DESCRIPTION RISER PORT SIZE SLOT SIZE
LC-D1210-13 Lower Screen, 3-Stack 13/16 inch
(0.813 inch O.D.)
0.007 to 0.010 inch
(0.17 to 0.25 mm)
LC-D1210-01 Lower Screen, 6-Stack 13/16 inch
(0.813 inch O.D.)
0.007 to 0.010 inch
(0.17 to 0.25 mm)
LC-D1212-06 Lower Screen, 11-Stack 3/4 inch
(1.050 inch O.D.)
0.007 to 0.010 inch
(0.17 to 0.25 mm)
LC-D1212-04 Lower Screen, 11-Stack 3/4 inch
(1.050 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
LC-D1212-21 Lower Screen, 15-Stack 1 inch
(1.320 inch O.D.)
0.010 to 0.013 inch
(0.25 to 0.33 mm)
 
 
SWT's Polypropylene Bottom Distributor Basket with 3/4-inch FNPT Connection (SM-D2011)
SWT’s Polypropylene Bottom Distributor Baskets are the choice for high temperature, ultrapure, and DI applications. They are constructed of 100% natural polypropylene for excellent chemical compatibility and resistance to acid and alkaline solutions. A unique three-piece design allows it to be quickly disassembled for easy cleaning.
Materials of construction: Polypropylene
Total open area of slots: 0.303 sq.in.
PART NUMBER DESCRIPTION RISER PORT SIZE SLOT SIZE
SM-D2011 Bottom Distributor Basket 3/4 inch FNPT 0.007 to 0.010 inch
(0.17 to 0.25 mm)
 
 
SWT's Modular Design Slotted Strainer/Lower Basket (LP-MB150S-340-5)
SWT’s Slotted Strainer/Lower Basket features a modular design which allows it to be quickly disassembled for easy cleaning. Made in USA.
Materials of construction: Polypropylene screen, ABS collar
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
LP-MB150S-340-3 Lower Basket/Strainer
4-3/8 inch OAH
1-1/2 inch Socket 0.008 inch
(0.20 mm)
LP-MB150S-340-5 Lower Basket/Strainer
6-3/8 inch OAH
1-1/2 inch Socket 0.008 inch
(0.20 mm)
 
 
SWT's PVC Slotted Strainer (SM-MS241510)
SWT’s PVC Slotted Strainer is an extremely rugged, single point, high flow strainer basket constructed of Schedule 40 PVC. Made in USA.
Materials of construction: PVC
Total open area of slots: 1.17 sq.in.
Maximum flow rate: 39 gpm @ 1 psid
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
SM-MS241510 Slotted Strainer 1-1/2 inch Socket 0.010 inch
(0.25 mm)
 
 
SWT's Baffle Plate Strainer with 1/2-inch MNPT Connection (SM-MBP500M)
SWT’s Baffle Plate Strainers are a convenient and reliable choice when servicing a tank containing a baffle plate. A variety of standard connections is available.
Materials of construction: ABS
Total open area of slots: Approximately 0.9 sq.in.
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
SM-MBP500M Baffle Plate Strainer 1/2 inch MNPT Average 0.012 inch
(0.305 mm)
SM-MBP500F Baffle Plate Strainer 1/2 inch FNPT Average 0.012 inch
(0.305 mm)
SM-MBP750M Baffle Plate Strainer 3/4 inch MNPT Average 0.012 inch
(0.305 mm)
SM-MBP100M Baffle Plate Strainer 1 inch MNPT Average 0.012 inch
(0.305 mm)
 
 
SWT's Stainless Steel 1-inch FNPT Baffle Plate Strainer (CS-10C-F-316)
SWT's Stainless Steel 1-inch MNPT Baffle Plate Strainer (CS-10C-M-316)
SWT’s Stainless Steel Baffle Plate Strainers are V profile welded wedge wire screen baskets. They provide more sufficient opening than perforated metal baskets and are stronger and can bear heavier loading pressure than woven mesh filter baskets. They work with all the benefits of the perforated and woven mesh filter baskets and avoid the shortcomings.
Materials of construction: SS316L
Total open area of slots: 12.9%
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
CS-10C-F-316 Baffle Plate Strainer 1 inch FNPT 0.007 inch
(0.17 mm)
CS-10C-M-316 Baffle Plate Strainer 1 inch MNPT 0.007 inch
(0.17 mm)
 
 
SWT's Baffle Plate Nozzle Kit Assembled (LP-BPN-M24-45-PP)
SWT's Baffle Plate Nozzle Kit Parts (LP-BPN-M24-45-PP)
SWT’s Baffle Plate Nozzle Kit features a unique three-piece design which allows it to be quickly disassembled for easy cleaning. Made in USA.
Materials of construction: Polypropylene, EPDM gasket
Total open area of slots: 0.3 sq.in. (1.95 sq.cm.)
Approximately 38% more area than 1/2 inch pipe ID area
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
LP-BPN-M24-45-PP Baffle Plate Nozzle Fits 1 to 1.75 inch Baffle Plate Holes 0.008 inch
(0.2 mm)
 
 
SWT's Maxi-Flo Flow Nozzle Assembly (SM-MBPS125-PP)
SWT’s Maxi-Flo Flow Nozzle Assembly is a baffle plate strainer for use with US Filter underdrains. Made in USA.
Materials of construction: Polypropylene, EPDM o-ring & gaskets
Total open area of slots: 0.44 sq.in. approx.
PART NUMBER DESCRIPTION CONNECTION SIZE SLOT SIZE
SM-MBPS125-PP Baffle Plate Nozzle Fits 1.25 to 1.5 inch Baffle Plate Holes 0.080 inch
(2 mm)
 
 
 
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
 
 
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924
E-mail: info@swtwater.com
http://www.swtwater.com

Last Updated: September 16, 2016