Spectra Watermakers
Spectra Watermakers 2.5" X 21" MEMBRANE KIT KIT-MB-20F
$772.00
Manuals & support
Start with your model’s parts diagram and the number on the installed part. Match any model, controls, voltage, or serial-range notes shown in this listing.
Spectra / Katadyn manufacturer support ↗Overview
Overview
KIT-MB-20F replaces the short reverse-osmosis element inside a Spectra membrane pressure vessel. The element separates the fresh product-water stream from the concentrated brine; the pressure vessel and its retaining hardware stay with the system.
Spectra’s product page calls this a 2.5 × 20-inch kit. Some assembly drawings call the same KIT-MB-20F a 21-inch membrane. Those names refer to the same Spectra kit, so the part number is more useful than that one-inch naming difference.
A Ventura short-vessel installation and a compact Catalina or Newport installation can use the same length class but different element counts. For example, the Newport 400C Compact fact sheet specifies two 20-inch elements.
Specifications & Contents
Specifications & Contents
| Part number | KIT-MB-20F |
|---|---|
| Nominal element size | 2.5-inch diameter × 20-inch length class |
| Supplied | Seawater RO membrane and replacement seals; Spectra specifies FilmTec or equivalent |
| Order basis | One kit per element being replaced |
| Vessel hardware | Pressure vessel, end caps and retaining rings are separate components |
Fits My System
Fits My System
Choose the installed membrane arrangement below. Short and standard versions of Catalina, Cape Horn and Newport systems can take different lengths; count the elements as well as identifying the model.
Select your configuration to see its requirements, or open the complete reference below.
All documented configurations and requirements
Each group applies only to the listed configurations and installed hardware. Match the conditions and manufacturer references before ordering.
Documented configurations
- Aquifer 200 DC · Manual · Match installed voltage and hardware
Original single short membrane module shown in this model manual. The parts diagram explicitly specifies KIT-MB-20F (labeled 2.5 x 21 inches in the drawing; sold as the 2.5 x 20-inch kit). One kit replaces the original membrane and includes seals; check the installed module has not been modified.
Documented configurations
- Aquifer 200 Expedition Flight Ready · Manual · Match installed voltage and hardware
- Aquifer 360 Expedition Flight Ready · Manual · Match installed voltage and hardware
small-Aquifer configuration in the linked manual. Identify Flight Ready versus DC/solar and original membrane/pump arrangement; not Aquifer 3000.
Documented configurations
- Aquifer 200 Power Pack Solar · Manual · Match installed voltage and hardware
Original single short membrane module shown in this model manual. The parts diagram explicitly specifies KIT-MB-20F (labeled 2.5 x 21 inches in the drawing; sold as the 2.5 x 20-inch kit). One kit replaces the original membrane and includes seals; check the installed module has not been modified.
Documented configurations
- Aquifer 360 DC · Manual · Match installed voltage and hardware
Original single short membrane module shown in this model manual. The parts diagram explicitly specifies KIT-MB-20F (labeled 2.5 x 21 inches in the drawing; sold as the 2.5 x 20-inch kit). One kit replaces the original membrane and includes seals; check the installed module has not been modified.
Documented configurations
- Cape Horn Extreme 330 · Deluxe · 12 VDC · Compact / short membranes · CH-330-12S
- Cape Horn Extreme 330 · Deluxe · 24 VDC · Compact / short membranes · CH-330-24S
Cape Horn Extreme 330 Compact, original compact / short membrane arrangement: 2 2.5-inch diameter x 20-inch membranes installed. Each KIT-MB-20F kit replaces one membrane and includes seals; replacing every original element requires 2 kits. Match the installed vessel and end-cap/seal arrangement. This does not cover a modified membrane arrangement or the other diameter/length.
Documented configurations
- Cape Horn Extreme 330R · Remote · 12 VDC · Compact / short membranes · CH-330R-12S
- Cape Horn Extreme 330R · Remote · 24 VDC · Compact / short membranes · CH-330R-24S
Cape Horn Extreme 330R Compact, original compact / short membrane arrangement: 2 2.5-inch diameter x 20-inch membranes installed. Each KIT-MB-20F kit replaces one membrane and includes seals; replacing every original element requires 2 kits. Match the installed vessel and end-cap/seal arrangement. This does not cover a modified membrane arrangement or the other diameter/length.
Documented configurations
- Catalina 300 Mk II-Z · MPC 5000 · Match installed voltage and hardware
For the compact module illustrated on page 93 only: two 20-inch membranes (FT-MB-20F). Each KIT-MB-20F replaces one membrane and includes seals; a complete replacement in this illustrated compact module needs two kits. Check that your installed arrangement is the illustrated two-short-vessel module before ordering; this does not establish fit for a long-vessel or modified Catalina 300 Mk II-Z.
Documented configurations
- Catalina 340C · Connect · 12 VDC · Compact / short membranes · CT-340C-12S
- Catalina 340C · Connect · 24 VDC · Compact / short membranes · CT-340C-24S
- Catalina 340C · Connect · 48 VDC · Compact / short membranes · CT-340C-48S
Catalina 340C Compact, original compact / short membrane arrangement: 2 2.5-inch diameter x 20-inch membranes installed. Each KIT-MB-20F kit replaces one membrane and includes seals; replacing every original element requires 2 kits. Match the installed vessel and end-cap/seal arrangement. This does not cover a modified membrane arrangement or the other diameter/length.
Documented configurations
- Catalina 340R · Remote · 12 VDC · Compact / short membranes · CT-340RS-12
- Catalina 340R · Remote · 24 VDC · Compact / short membranes · CT-340RS-24
- Catalina 340R · Remote · 48 VDC · Compact / short membranes · CT-340RS-48
Catalina 340R Compact, original compact / short membrane arrangement: 2 2.5-inch diameter x 20-inch membranes installed. Each KIT-MB-20F kit replaces one membrane and includes seals; replacing every original element requires 2 kits. Match the installed vessel and end-cap/seal arrangement. This does not cover a modified membrane arrangement or the other diameter/length.
Documented configurations
- Newport 400C · Connect · 12 VDC · Compact / short membranes · NP-400C-12S
- Newport 400C · Connect · 24 VDC · Compact / short membranes · NP-400C-24S
- Newport 400C · Connect · 48 VDC · Compact / short membranes · NP-400C-48S
Newport 400C Compact, original compact / short membrane arrangement: 2 2.5-inch diameter x 20-inch membranes installed. Each KIT-MB-20F kit replaces one membrane and includes seals; replacing every original element requires 2 kits. Match the installed vessel and end-cap/seal arrangement. This does not cover a modified membrane arrangement or the other diameter/length.
Documented configurations
- Ventura 150 MPC · Match installed voltage and hardware
- Ventura 200T MPC · Match installed voltage and hardware
Ventura 150/200T MPC with the original single short 20-inch membrane module. KIT-MB-20F supplies the replacement membrane and seals. Match the installed short pressure vessel and replace one membrane per original module; this record does not cover a modified or extended membrane arrangement. Spectra labels this same kit 2.5 x 20 inches on its product page and 2.5 x 21 inches in its parts drawing.
Parts diagram / guide, page 10 · Parts diagram / guide, page 77 · Manufacturer guide · Parts diagram / guide, page 50
Documented configurations
- Ventura 150C · Connect · 12 VDC · Standard · VT-150C-12V
- Ventura 150C · Connect · 24 VDC · Standard · VT-150C-24V
- Ventura 200C · Connect · 12 VDC · Standard · VT-200C-12V
- Ventura 200C · Connect · 24 VDC · Standard · VT-200C-24V
Ventura Connect short pressure-vessel module. Match installed assembly, port/thread or tube dimensions, material and pressure duty; documented original arrangement only.
Documented configurations
- Ventura 150D · Deluxe · 12 VDC · Standard · VT-150-D-12V
- Ventura 150D · Deluxe · 24 VDC · Standard · VT-150-D-24V
- Ventura 200T · Deluxe · 12 VDC · Standard · VT-200-T-12
- Ventura 200T · Deluxe · 24 VDC · Standard · VT-200-T-24
Ventura short pressure-vessel module. Match installed assembly, port/thread or tube dimensions, material and pressure duty; documented original arrangement only.
Documented configurations
- Ventura 150R · Remote · 12 VDC · Standard · VT-150R-12
- Ventura 150R · Remote · 24 VDC · Standard · VT-150R-24
- Ventura 200R-T · Remote · 12 VDC · Standard · VT-200R-T-12
- Ventura 200R-T · Remote · 24 VDC · Standard · VT-200R-T-24
Ventura Remote short pressure-vessel module. Match installed assembly, port/thread or tube dimensions, material and pressure duty; documented original arrangement only.
FAQs
FAQs
Does the 21-inch label mean a different kit?
Spectra uses both 20-inch and 21-inch descriptions for KIT-MB-20F. Identify it by the complete kit number and the installed short-vessel arrangement.
Does low output prove I need a membrane?
No. The Ventura manual calls for a flow test before membrane cleaning and identifies feed-pump, voltage and operating-condition problems as other causes. Use its troubleshooting checks before ordering an element.
