Tank Connector (Straight) - Irrigation Fitting - Simple 25mm Reservoir Coupling
Best for: Growers linking two water butts or reservoirs together, or plumbing a tank into a 25mm hydroponic system.
Our thoughts
It's a small, unglamorous part, but it's exactly the sort of thing that ruins your week if it fails - so we'd rather sell a solid one for a few quid than have you patching a leak with tape. This does the job cleanly and fits the 25mm holes most butts and systems already use.
The Straight Tank Connector is a basic irrigation fitting that pushes into a predrilled 25mm hole in a water butt or reservoir, giving you a sealed straight-through connection to link two tanks together or to plumb a tank into a wider system. It's the sort of fitting used throughout Nutriculture's own IWS (Intelligent Water Systems) range and other 25mm hydroponic plumbing, so it drops straight into most existing setups without adapters.
How it compares
A basic, no-frills fitting rather than a branded system component - priced accordingly.
- Compared to buying an equivalent connector as part of a boxed IWS kit, picking one up separately like this is the cheaper route if you just need a replacement or an extra link.
- Compared to improvising with generic plumbing tank connectors from a hardware store, this is sized specifically for the 25mm holes standard across most grow-shop reservoirs and butts, so fit is guaranteed rather than a gamble.
- Compared to threaded bulkhead fittings, the push-fit straight design is quicker to install and doesn't need tools or thread sealant.
Not a product you need to think hard about - just make sure your hole is the standard 25mm size and this will fit.
Usage guidance
Fitting
Push the connector into the predrilled 25mm hole from inside the tank so the sealing flange sits flush against the tank wall, then secure the outer nut by hand - no tools or sealant needed for a properly sized hole.
Linking tanks
Use a short length of 25mm pipe or hose between two connectors to join separate reservoirs into one larger water source, useful when scaling up a system without buying a bigger single tank.
Checking the seal
Fill the tank partway and check around the fitting for drips before relying on it full - a loose nut is the most common cause of a slow leak.
Technical specifications
- Fitting size: 25mm
- Type: Straight through-connector, push-fit with retaining nut
- Compatible with: Standard 25mm reservoir/water butt holes, IWS and similar 25mm hydroponic systems
- Material: Moulded plastic body and sealing washer
- Installation: No tools required
Who this is for
- Growers linking multiple water butts or reservoirs into one larger supply
- Anyone replacing a worn or cracked connector on an existing IWS-style system
- Growers plumbing a spare tank into a flood and drain or recirculating setup
Keep a spare or two in the shed - at this price it's cheaper to have one on hand than to be without one when a fitting fails.
Our take
There's nothing to overthink here - it's a correctly sized, properly sealing fitting for a job that doesn't need reinventing. Buying the right part rather than improvising saves you a leak down the line.
Does exactly what it should, day in, day out. Worth keeping a couple in stock alongside your other spare fittings.
