Frequently Asked Questions
How many washers and nuts do I need for each IWS 25mm Pro fitting?
Two rubber washers and one plastic nut for every fitting. Our AutoDrain brain page says the same when it tells you to buy 6 straights, 6 nuts and 12 washers to fit 25mm outlets on a Standard bucket. The washers and nut are separate options on this page, so add them for each straight, tee or elbow in your basket.
Which IWS 25mm Pro fitting do I need, straight, tee or elbow?
Use a straight where a pipe meets a pot, a tee where the pipe carries on to the next pot, and an elbow for the last pot at the end of the run. That follows the part descriptions above: the tee sits in the middle of a pipe run to extend it, and the elbow finishes the run and turns the corner into the last outer pot. Not sure how your run is laid out? Ask us before you order.
Will IWS 25mm Pro fittings fit my 16mm IWS Standard system?
Not as they come, because these are 25mm Pro parts and the Standard system runs on 16mm fittings. You can convert, though. The Standard AutoDrain bucket has glands you can remove and swap for 25mm fittings, and our IWS 16mm Drain Fittings page lists a female hose tail that connects 25mm Pro fittings to 13mm standard pipe. For a plain 16mm run, you want the 16mm fittings instead.
What does the IWS Pro individual pot filter do?
It sits inside the pot and filters out large particles, so they do not get washed back into your reservoir. It is 110 mm long with a 25 mm female thread, and it attaches to a 1 inch male drain hose tail, or to a 16 mm reducing grommet on older 16 mm systems. The cage is hard-wearing plastic with a copper mesh that repels roots and limits their ingress.
Can I buy IWS Pro washers and nuts on their own?
Yes. The Pro Rubber Washer and Pro Plastic Nut are their own options on this page, so you can order just the one you lost. Remember that a fitting takes 2 washers and 1 nut, and it is worth adding a spare or two because they are cheap and small.
What size pipe do IWS 25mm Pro fittings fit?
25mm. The barbed end goes into 25mm pipe and the threaded end goes inside the pot. Our 25mm Black IWS Pipe is 25mm inner diameter and comes by the metre or as a 30m roll.
Description
The IWS 25mm Pro Drain Fittings are the loose parts for a 25mm IWS Pro flood and drain system: barbed straights, tees and elbows, the washers and nuts that seal them, an individual pot filter and a double barbed pipe joiner. They are for anyone running an IWS Pro set-up who is adding a pot, replacing a fitting that has cracked or gone walkabout, or fitting 25mm outlets to a Standard AutoDrain bucket.
Choose from a selection of genuine 25mm IWS components that are perfect for upgrading your system or replacing lost or damaged parts. Each option in the drop-down is one single part. A straight, tee or elbow on its own does not come with washers or a nut, so add 2 rubber washers and 1 plastic nut for every fitting you order.
In the box: the one part you choose, nothing else. Do not bin the washers and the nut.
The Pro Rubber Washer and Pro Plastic Nut are tiny, and they are the bits that get swept out with the packaging. Every fitting needs 2 washers and 1 nut to seal in the pot. The part descriptions below say the washer goes on either side of the fitting and pot, and that the nut is used with the fitting, washer and pot for a tight seal. We have nothing that says which way round the nut sits, so take a quick photo of your old fitting before you strip it down.
IWS 25mm Pro Drain Fittings specifications
| Spec | Detail |
|---|---|
| Brand | IWS |
| Model | 25mm Pro Drain Fittings |
| Size | 25mm, IWS Pro range |
| Pipe end | Barbed, holds the pipe securely |
| Pot end | Screw end, fitted inside the pot |
| Each fitting needs | 2 x Pro Rubber Washer and 1 x Pro Plastic Nut (separate options) |
| Options | 7 single parts, each sold on its own |
| Fitting material and thread size | We do not have these figures. Ask us if it matters for your build |
IWS 25mm Pro Drain Fittings: the parts at a glance
| Option | What it is | Price | Goes with |
|---|---|---|---|
| Pro Barbed Straight Piece | Universal straight that fits onto the pots. Barbs grip the pipe, screw end goes inside the pot | £2.95 | 2 x Pro Rubber Washer, 1 x Pro Plastic Nut |
| Pro Barbed Tee Piece | Fits into the middle of a pipe run to extend it | £2.95 | 2 x Pro Rubber Washer, 1 x Pro Plastic Nut |
| Pro Barbed Elbow Piece | Finishes the end of a pipe run and turns the corner into the last outer pot | £2.95 | 2 x Pro Rubber Washer, 1 x Pro Plastic Nut |
| Pro Plastic Nut | Used with the fitting, washer and pot for a tight seal | £0.90 | 1 per fitting |
| Pro Rubber Washer | Goes on either side of the fitting and pot for a tight seal | £0.45 | 2 per fitting |
| Pro Individual Pot Filter | Inline filter, 110 mm long, 25 mm female thread, with a copper mesh that repels roots | £3.50 | A 1 inch male drain hose tail, or a 16 mm reducing grommet on older 16 mm systems |
| Pro Double Barbed Pipe Joiner | Barbed at both ends, joins two lengths of pipe in a straight line | £4.00 | Two lengths of pipe |
About each IWS 25mm Pro Drain Fittings part
IWS 25mm Pro Barbed Straight Piece
A Universal Straight that fits onto the pots of your IWS Hydroponics system. The barbs on one end of the Straight Piece hold it very securely in the piping. The screw end attaches securely inside your pots.
IWS 25mm Pro Barbed Tee Piece
The Universal Tee Piece fits onto the middle of a piping-run to extend the pipe. The barbs on one end of the Universal Tee-joint hold it very securely in the piping. The screw end attaches securely inside your pots.
IWS 25mm Pro Barbed Elbow Piece
The Universal Elbow fits onto the end of piping run to terminate the pipe and provide a convenient way of “turning the corner” into the last Outer Pot on your IWS Hydroponics system. The barbs on one end of the Universal Elbow hold it very securely in the piping. The screw end attaches securely inside your pots.
IWS 25mm Pro Plastic Nut
The IWS 25mm Plastic Nut should be used with your IWS 25mm fitting, washer and pot to ensure a tight seal.
IWS 25mm Pro Rubber Washer
The IWS 25mm Washer should be used on either side of your IWS 25mm fitting and pot to ensure a tight seal.
IWS 25mm Pro Individual Pot Filter
The inline IWS flood and drain-drain filter is 110 mm long and has a 25 mm female thread that attached to a 1" diameter male drain hose tail or a 16 mm reducing grommet for older 16 mm systems.
The filter sits inside the pot and acts to filter out large particles, stopping them from returning to the reservoir. The filter is a hard-wearing plastic cage with a copper mesh that repels roots, limiting their ingress.
IWS 25mm Pro Double Barbed Pipe Joiner
Barbed at both ends, so it joins two lengths of pipe in a straight line. It sits in the Pro (25mm) range on this page. We do not hold a size sheet for it, so if you are matching it to anything other than IWS Pro pipe, ask us first.
IWS 25mm Pro Drain Fittings FAQs
How many washers and nuts do I need for each IWS 25mm Pro fitting?
Two rubber washers and one plastic nut for every fitting. Our AutoDrain brain page says the same when it tells you to buy 6 straights, 6 nuts and 12 washers to fit 25mm outlets on a Standard bucket. The washers and nut are separate options on this page, so add them for each straight, tee or elbow in your basket.
Which IWS 25mm Pro fitting do I need, straight, tee or elbow?
Use a straight where a pipe meets a pot, a tee where the pipe carries on to the next pot, and an elbow for the last pot at the end of the run. That follows the part descriptions above: the tee sits in the middle of a pipe run to extend it, and the elbow finishes the run and turns the corner into the last outer pot. Not sure how your run is laid out? Ask us before you order.
Will IWS 25mm Pro fittings fit my 16mm IWS Standard system?
Not as they come, because these are 25mm Pro parts and the Standard system runs on 16mm fittings. You can convert, though. The Standard AutoDrain bucket has glands you can remove and swap for 25mm fittings, and our IWS 16mm Drain Fittings page lists a female hose tail that connects 25mm Pro fittings to 13mm standard pipe. For a plain 16mm run, you want the 16mm fittings instead.
What does the IWS Pro individual pot filter do?
It sits inside the pot and filters out large particles, so they do not get washed back into your reservoir. It is 110 mm long with a 25 mm female thread, and it attaches to a 1 inch male drain hose tail, or to a 16 mm reducing grommet on older 16 mm systems. The cage is hard-wearing plastic with a copper mesh that repels roots and limits their ingress.
Can I buy IWS Pro washers and nuts on their own?
Yes. The Pro Rubber Washer and Pro Plastic Nut are their own options on this page, so you can order just the one you lost. Remember that a fitting takes 2 washers and 1 nut, and it is worth adding a spare or two because they are cheap and small.
What size pipe do IWS 25mm Pro fittings fit?
25mm. The barbed end goes into 25mm pipe and the threaded end goes inside the pot. Our 25mm Black IWS Pipe is 25mm inner diameter and comes by the metre or as a 30m roll.
Looking for the whole system? See the IWS Flood and Drain Systems range.
