Custom Masters/Flo King
Phone: 407-331-4634
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email: info@floking.com

HOW TO SELECT BX650 PUMP-BODY LENGTH
The BX650 is available in different pump-body lengths. Solution must be at least 1 inch (2.54 cm) above the BX650 "Weep Hole" at all times, or the pump will not operate. See drawing at right.

Explanation: The Impeller is located just below the Weep Hole. Like the propeller of an outboard boat motor, the Impeller spins at high speed and cannot perform its task without liquid contact. See this link for photo explanation.

If you already have a BX650 and want the exact same body length, measure the "A" Dimension (from bottom of Motor Base, where pump is mounted on tank, to center of Discharge Port, where solution is expelled from pump). The "A" Dimension is highlighted in yellow below. The adjacent table shows the corresponding pump-body length, which is the order number.


"A" Dimension
Pump Body Length*
4-1/2" (11 cm)
BX650-4
6-1/2" (17 cm)
BX650-6
9-1/16" (23 cm)
BX650-8
10-3/4" (28 cm)
BX650-10

* Stainless Steel BX650 is available as a special-order item, but only in 10" pump-body length.

How To Select BX650 Length for New Application
If you need a BX650 for a new application, measure the freeboard (distance from top of tank to solution surface), then refer to the table below. The most popular units are the BX650-8 and BX650-10. For shallower tanks, the BX650-6 may be necessary. The BX650-4 is used much less frequently and is normally reserved for very shallow tanks with freeboard of 2 inches (5 cm) or less.

Tank Freeboard


If freeboard is
Use this body length*
1" (2.5 cm)
BX650-4, BX650-6 or BX650-8
2" (5 cm)
BX650-4, BX650-6 or BX650-8
3" (7.6 cm)
BX650-6 or BX1200-8
4" (10 cm)
BX650-6, BX650-8 or BX650-10
5" (12.7 cm)
BX650-8 or BX650-10
6"(15 cm)
BX650-8 or BX650-10
7" (17.7 cm)
BX650-10
8" (20.3 cm)
BX650-10

BX650 with Single Fllter Cartridge
Next, measure the tank depth. Then see the table below to determine the maximum length filter cartridge that will fit in your tank.

Important! Measurements below are with the Permacore Magnum Reusable Filter Cartridge, which is 1 inch (2.54 cm) longer than the Poly-Spun Disposable Cartridge, the Carbon Cartridge, and the Standard Magnum Reusable Cartridge. If you intend to use the Poly-Spun, Carbon or Standard Magnum cartridges, you can subtract 1 inch from dimensions below. Click this link for cartridge photos.


BX650 One Filter Draw



Pump Body Length

With One
10"-Long
(25-cm) Cartridge
Attached

With One
15"-Long
(38-cm) Cartridge
Attached

With One
20"-Long
(50.8 cm) Cartridge
Attached
BX650-4
16-3/4" (42 cm)
21-3/4" (54 cm)
26-3/4" (67 cm)
BX650-6
18-3/4" (47 cm)
23-3/4" (59 cm)
28-3/4" (72 cm)
BX650-8
21-3/8" (54 cm)
26-3/8" (67 cm)
31-3/8" (80 cm)
BX650-10
23" (58 cm)
28" (70 cm)
33" (83 cm)

BX650 with Double Cartridge Holder (DCH)
Occasionally, customers use the BX650 with a Double Cartridge Holder (DCH), which allows the use of two filter cartridges at once instead of just one. This adds filter surface to solution and prolongs the time between filter changes, but is not necessary for most applications in small tanks. See table below to determine the maximum length filter cartridges that will fit in your tank with DCH attached.


BX650 with DCH Draw



Pump Body Length

With Two
10"-Long
(25-cm) Cartridges
Attached

With Two
15"-Long
(38-cm) Cartridges
Attached

With Two
20"-Long
(50.8 cm) Cartridges
Attached
BX650-4
20-1/4" (51 cm)
25-1/4" (63 cm)
30-1/4" (76 cm)
BX650-6
22-1/4" (56 cm)
27-1/4" (68 cm)
32-1/4" (81 cm)
BX650-8
24-7/8" (63 cm)
29-7/8" (75 cm)
34-78" (87 cm)
BX650-10
26-3/8" (66 cm)
31-3/8" (78 cm)
36-3/8" (90 cm)

BX650 with Strainer Instead of Filter Cartridge
If you want to use the BX650 exclusively to recirculate and agitate the solution, and do not want a filter cartridge on the pump, you must install a Pump Strainer Adapter (PSA) to protect the Impeller from damage due to any foreign objects that might be in solution. The PSA adds only about 1 inch (2.54 cm) of length to the pump, as shown below. Click this link for PSA and other BX650 parts photos.

BX650 with Strainer Draw


Pump Body Length
Depth With PSA Attached
BX650-4
7.5" (19 cm)
BX650-6
9.5" (24 cm)
BX650-8
12-1/8" (30 cm)
BX650-10 13-3/4" (34.9 cm)


BX650 with Horizontal Cartridge Adapter-Special (HCAS)
Occasionally, the tank may be too shallow and the freeboard too extensive to use the BX650 with filter cartridge in the conventional vertical position. In this event, the filter cartridge can be positioned horizontally in the tank using the Horizontal Cartridge Adapter-Special (HCAS). The HCAS adds about 4 inches (10 cm) of length to the pump, as shown below. Click this link for HCAS and other BX650 parts photos.

BX650 with HCAS Draw


Pump Body Length
Depth With HCAS Attached*
BX650-4
9.75" (24.75 cm)
BX650-6
11.75" (29.85 cm)
BX650-8
14-1/4" (36.2 cm)
BX650-10 16" (40.6 cm)

* HCAS not available in stainless steel.

xxx

 

BX650 Weep Hole

On BX650, solution must be at least 1" (2.54 cm) above Weep Hole at all times.



Most customers use BX650 with one cartridge.