Water Filter Upgrade Kits & Accessories

National Hydro Group is your online source for Water Filter Upgrade Kits & Accessories. If you cant find the Water Filter Upgrade Kits & Accessories that meet your needs please give us a ring or send a quick email so we can help you find exactly what you're looking for.
Hydro-Logic Float Valve with 1/4" Quick Connect-NWGSupply.com
Save 13%
$19.00
$16.50

Hydro-Logic Float Valve with 1/4" Quick Connect

HydroLogic

This Hydro-Logic Float Valve features a quick-connect fitting which allows it to connect to Stealth, Small Boy, or any water filtration system usin...

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$19.00
$16.50
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Hydrologic Blue Tubing, 3/8", 500' roll-NWGSupply.com
Save 30%
$155.00
$109.24

Hydrologic Blue Tubing, 3/8", 500' roll

HydroLogic

Customize your indoor hydroponic Hydrologic reverse osmosis water filtration system with 3/8" blue tubing. Comes in a 500 foot roll.

$155.00
$109.24
Save 30%
GoGreen Garden Hose Water Filter-NWGSupply.com
Save 16%
$55.00
$46.13

GoGreen Garden Hose Water Filter

HydroLogic

For pure water straight from the hose, there’s the GoGreen Garden Hose Water Filter. GoGreen uses environmentally friendly green coconut carbon and...

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$55.00
$46.13
Save 16%
Float Valve, 1/2" Barb, Adjustable Water Level-NWGSupply.com
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$19.00
$16.50

Float Valve, 1/2" Barb, Adjustable Water Level

Hydro-Logic

1/2" barbed connection. Adjustable water level and can be mounted horizontally or vertically.

$19.00
$16.50
Save 13%
Hydro-Logic Blue Tubing 3/8", 50'-NWGSupply.com
Save 3%
$17.00
$16.50

Hydro-Logic Blue Tubing 3/8", 50'

HydroLogic

Replace worn out tubing or extend existing Hydro-Logic reverse osmosis water purification systems with Hydro-Logic Blue Tubing. Product has a diame...

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$17.00
$16.50
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Stealth RO100/200 Pressure Gauge/Fitting Assembly-NWGSupply.com
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$17.50
$15.75

Stealth RO100/200 Pressure Gauge/Fitting Assembly

Hydro-Logic

Stealth RO100/200 pressure gauge/fitting assembly

$17.50
$15.75
Save 10%
Small Boy Upgrade Kit, Converts to Stealth RO-100-NWGSupply.com
Save 19%
$100.00
$81.00

Small Boy Upgrade Kit, Converts to Stealth RO-100

Hydro-Logic

Upgrades Small Boy to 100 GPD RO system.

$100.00
$81.00
Save 19%
Male x Male Adapter For Supply Diverter Valve For Fauce-NWGSupply.com
Save 59%
$7.89
$3.20

Male x Male Adapter For Supply Diverter Valve For Fauce

Hydro-Logic

Allows ¼" and 3/8" faucet diverters to connect to faucets with 15/16" - 27 female threads. Male 13/16" - 27 thread x Male 15/16" - 27 thread.

$7.89
$3.20
Save 59%
Hydrologic Big Boy UV Sterilizer Kit-NWGSupply.com
Save 20%
$489.00
$389.74

Hydrologic Big Boy UV Sterilizer Kit

Hydro-Logic

UV Sterilizer Kit - Big Boy

$489.00
$389.74
Save 20%
Filter Canister For Evolution RO1000-NWGSupply.com
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$56.00
$47.60

Filter Canister For Evolution RO1000

Hydro-Logic

This is a replacement canister for the Merlin Garden Pro.

$56.00
$47.60
Save 15%
Growonix Electric Shut Off Kit-NWGSupply.com
Save 15%
$231.00
$196.39

Growonix Electric Shut Off Kit

GrowoniX

An essential add-on to almost any water filter! Shuts down feed water before the water filter. Controls on/off cycling of high pressure booster pum...

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$231.00
$196.39
Save 15%
Stealth RO100 1:1 Ratio Flow Restrictor-NWGSupply.com
Save 5%
$9.50
$9.00

Stealth RO100 1:1 Ratio Flow Restrictor

HydroLogic

Gardeners can waste less water with the Stealth RO100 Flow Restrictor. Achieves a 1:1 waste-to-water ratio with the Stealth Reverse Osmosis 100 Sys...

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$9.50
$9.00
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Stealth RO200 1:1 Ratio Flow Restrictor-NWGSupply.com
Save 5%
$9.50
$9.00

Stealth RO200 1:1 Ratio Flow Restrictor

HydroLogic

Gardeners can waste less water with the Stealth RO200 Flow Restrictor. Achieves a 1:1 waste-to-water ratio with the Stealth Reverse Osmosis 200 Sys...

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$9.50
$9.00
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Quick Connect Union, 1/4"-NWGSupply.com
Save 2%
$4.50
$4.40

Quick Connect Union, 1/4"

HydroLogic

Use this Hydro-Logic ¼” Quick Connect Union to join two lengths of tubing and extend your filter’s reach.

$4.50
$4.40
Save 2%
Quick Connect Tee, 1/4"-NWGSupply.com
Save 4%
$5.00
$4.80

Quick Connect Tee, 1/4"

HydroLogic

Use this Hydro-Logic ¼” Quick Connect Tee to deliver filtered water from your Hydro-Logic Stealth or Small Boy System to two different destinations...

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$5.00
$4.80
Save 4%
Stealth Reverse Osmosis, Low Pressure, High Flow Membrane, 200 gpd-NWGSupply.com
Save 19%
$100.00
$81.00

Stealth Reverse Osmosis, Low Pressure, High Flow Membrane, 200 gpd

HydroLogic

The Stealth Reverse Osmosis Low Pressure/High Flow Membrane replaces the standard membrane for Stealth RO100 and Stealth RO200 systems to compensat...

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$100.00
$81.00
Save 19%
Quick Connect Garden Hose Connector, 1/2"-NWGSupply.com
Save 14%
$11.50
$9.90

Quick Connect Garden Hose Connector, 1/2"

HydroLogic

The Quick Connect Garden Hose Connector replaces the one included with the Merlin Garden Pro, and it allows gardeners to connect either the Merlin ...

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$11.50
$9.90
Save 14%
Hydrologic Union Connector, 3/8"-NWGSupply.com
Save 4%
$5.00
$4.80

Hydrologic Union Connector, 3/8"

HydroLogic

Hydrologic's 3/8" Union Connector for use with Hydrologic Reverse Osmosis water-filtration systems. Customize your hydroponic indoor garden.

$5.00
$4.80
Save 4%
Quick Connect 2-Way Splitter, 1/4"-NWGSupply.com
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$5.50
$5.20

Quick Connect 2-Way Splitter, 1/4"

HydroLogic

Use this Hydro-Logic ¼” Quick Connect Two-Way Splitter to deliver filtered water from your Hydro-Logic Stealth or Small Boy System to two different...

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$5.50
$5.20
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Hydrologic Union, Straight, 1/2" QC x 1/2" QC-NWGSupply.com
Save 5%
$5.50
$5.20

Hydrologic Union, Straight, 1/2" QC x 1/2" QC

HydroLogic

1/4" QC 2-Way Splitter - "y" splitter for multiple reservoirs.

$5.50
$5.20
Save 5%
Quick Connect Inline Shut off Valve, 1/2"-NWGSupply.com
$8.00

Quick Connect Inline Shut off Valve, 1/2"

HydroLogic

This Quick Connect Inline Shutoff Valve is a replacement for the unit included with the Merlin Garden Pro, and it can also be used with the Tall Bl...

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$8.00
Hydrologic Two Way Splitter, 3/8"-NWGSupply.com
$6.00

Hydrologic Two Way Splitter, 3/8"

HydroLogic

Designed for use with Hydrologic's tubing, this two way splitter allows you to connect two ends of tubing to one (for 3/8" tubing only) to customiz...

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$6.00
Hydrologic stealthRO 200 Eco-Waste Reducer-NWGSupply.com
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$4.75
$4.40

Hydrologic stealthRO 200 Eco-Waste Reducer

HydroLogic

Standard option included with Stealth-RO units. Reduces waste to product ratio from standard 3:1 to 2:1. Saves more water. (photo shows complete u...

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$4.75
$4.40
Save 7%
Hydrologic stealthRO 100 Eco-Waste Reducer-NWGSupply.com
Save 7%
$4.75
$4.40

Hydrologic stealthRO 100 Eco-Waste Reducer

HydroLogic

Standard option included with stealthRO units. Reduces waste to product ratio from standard 3:1 to 2:1. Saves more water.

$4.75
$4.40
Save 7%