Hozelock 20-pot vs an all-in-one 30 m kit: which UK garden actually needs which?
The Hozelock box is often cheaper and includes a reducer. The 30 m kit is a longer ½-inch run — not a better brand.
DripSystem UK has no listed reducer or filter. Start there, before the pot count on either carton. The Hozelock 20-pot kit is typically 15 m of 4 mm tube, a Select Controller, a pressure reducer, and twenty pressure-compensating 4 LPH stakes. Typical street prices in September 2026 sit around £50–£70. The DripSystem UK box is £85.53: a tap timer, 30 m of ½-inch mainline, and twenty adjustable brass heads. Count pipe diameter and length first; the pot number on the lid is a marketing label.
Clustered patio pots within about 15 m of the tap: Hozelock’s 20-pot box is often the sensible Saturday buy. A house tap feeding mixed beds, two short raised beds, or a greenhouse at the end of a path: the extra metres of ½-inch are the actual difference.
What is actually in each box
Figures below are typical UK street prices for September 2026. They move with promotions. No “best buy” column: these kits do different work.
| Hozelock 20-pot | Hozelock 25-pot | Gardena terrace | DripSystem UK | |
|---|---|---|---|---|
| Typical street | £50–£70 | £70–£95 | £55–£75 | £85.53 |
| Timer in the box | Yes (Select Controller) | Yes | No | Yes |
| Mainline | 15 m × 4 mm | 15 m × 13 mm (plus 4 mm laterals) | 13 mm spine plus 4.6 mm laterals | 30 m × ½-inch |
| Emitters | 20 pressure-compensating 4 LPH stakes | 25 pressure-compensating 4 LPH drippers | Mix of adjustable and inline drippers | 20 brass, adjustable (drip, mist or spray) |
| Reducer / filter | Reducer in the box | Reducer in the box | Master unit with pressure control and filter | Not listed |
| Watering character | Even trickle on similar pots | Same idea, with a short 13 mm spine | Closed 4.6 mm micro-drip system | Twist each head; not pressure-compensating |
| Honest job | Clustered patio, hanging baskets, discreet tube | Patio plus a short hedge or row | Pots and troughs if you already own a Gardena timer | One tap, mixed beds, longer ½-inch run |
Holiday totals, same prices: Hozelock 20-pot already automatic at £50–£70; 25-pot typically £70–£95; Gardena terrace plus a Water Control often £108–£141; DripSystem UK £85.53. It is not cheaper than a discounted 20-pot. It is cheaper than the terrace set plus a timer. It is the only one of these four with 30 m of ½-inch in the box.
Why some listings look cheaper until you need a timer
Garden-centre and marketplace pages often sell the pipe and drippers as a “watering set” and leave the controller in another listing. Gardena’s terrace kit is the clean example: typical street £55–£75, and no timer in the box. That is fine if you already own a Water Control. It is a nasty surprise if you wanted one carton that waters while you are away.
Hozelock’s 20-pot and 25-pot kits usually include the Select Controller, which is why the 20-pot box still undercuts a lot of all-in-one kits even on 4 mm tube. Easy Drip Universal packs without a timer look cheaper still; they are a different shop. If the job is “leave on holiday”, add the controller before you compare pounds. Compare DripSystem UK’s timer-in-the-box with Hozelock’s timed kits — not with a terrace set that still needs a second purchase.
Reducer and filter: they ship one; we do not list one
Hozelock puts a pressure reducer in the 20-pot and 25-pot kits. Gardena’s terrace set uses a master unit that both reduces pressure and filters. DripSystem UK does not list a reducer or a filter. If your outdoor tap is fierce, or the water is gritty after a dry spell, that gap matters. You either add a reducer and filter yourself, or you should have bought Hozelock or Gardena.
A reducer is not a luxury extra on 4 mm Easy Drip: thin tube and small stakes are meant to run at a lower, steadier pressure. A ½-inch mainline takes more punch — useful on a long run, unhelpful if the brass heads mist when you wanted a trickle. Twist the caps down. If they still spray, the tap is the problem. None of this is a hosepipe-ban argument. Hozelock sometimes positions the 20-pot as drip-only with a reducer; that is their claim, for their kit. Check your water company. DripSystem UK does not claim an exemption, and a missing reducer is not a loophole.
When the Hozelock 20-pot is the better buy
Stay with Hozelock if most of the following is your garden:
- About twenty similar pots on one patio or balcony, within 15 m of 4 mm, and you want discreet tube — not a visible ½-inch backbone on York stone or decking.
- You want pressure-compensating 4 LPH stakes so the last pot matches the first, including a slight step or mixed pot heights.
- You want the cheapest complete automatic kit, with the timer already in the box, typically £50–£70 in September 2026.
- You want a UK spare-parts path — Screwfix, a garden centre, Amazon next-day — and a brand your neighbour already owns.
- You care about Hozelock’s drip-only-plus-reducer positioning in a hosepipe ban, and you will still check your water company.
- Hanging baskets and window boxes are the main job. Four-millimetre laterals and stakes are the native layout; brass risers on ½-inch are awkward unless you convert later.
If that is your garden, stay with Hozelock. The 20-pot box is the sensible buy. Do not pay extra for thirty metres of pipe you will coil behind the shed.
The 25-pot kit: closer on diameter, still only 15 m
The Hozelock 25-pot kit is the honest mid-fork. Typical street £70–£95. You still get a timer, a reducer, and pressure-compensating drippers, but the spine is 15 m of 13 mm rather than 15 m of 4 mm — the same diameter class as ½-inch, which is why it sits next to DripSystem UK in the table. It is still only 15 m of that spine, plus thinner laterals. If the tap is twenty or thirty metres from the last bed, you are buying more Hozelock pipe afterwards. A short hedge, a row of grow-bags, or patio pots plus one border: the 25-pot is often the better Hozelock box. It is not 30 m of mainline in one purchase.
When a 30 m ½-inch kit is the honest choice
Buy the DripSystem UK box only if this is actually your job:
- A pressurised outdoor tap, not a water-butt gravity feed. Hozelock markets the Select Controller with a butt in some packs; this kit is tap-first. A butt usually needs a pump.
- You want timer, pipe and emitters in one box, without a second Gardena or Easy Drip basket.
- The run is the point: about twenty planting points along up to 30 m of ½-inch — mixed beds, borders, two short raised beds, or house-tap-to-greenhouse — not twenty pots around one table.
- You want adjustable heads (twist down herbs, open tomatoes) and accept that this is not a 4 LPH pressure-compensating dripper. A head opened too far can mist or spray.
- You accept a more visible ½-inch mainline, and no listed reducer or filter. Fierce or gritty tap: add your own, or stay with Hozelock or Gardena.
- You accept there is no B&Q aisle for spare tees.
Twenty brass heads are twenty planting points — not a thirty-plant terrace set, and not an upgrade on Hozelock. They are adjustable metal emitters on a longer, thicker pipe, with a timer in the same carton.
If you want a timer plus 30 m of ½-inch and 20 adjustable brass heads in one box — and you accept there is no listed reducer — the DripSystem UK 30 m ½-inch drip kit with tap timer is £85.53, including VAT, with free UK delivery.
Spare parts: Hozelock wins the ecosystem
Hozelock, and Gardena, have a UK ecosystem. DripSystem UK does not. Extra 4 mm tube, tees, 4 LPH drippers and Select Controllers are ordinary Screwfix, garden-centre and Amazon-next-day lines. If a dripper clogs in July, that path is why people stay loyal.
Gardena is the same idea with a closed twist: 4.6 mm micro-drip will not take generic 4 mm or ½-inch extras. Do not mix this kit with Gardena 4.6 mm.
The B&Q Saturday myth needs a qualifier, not a scoff. Plenty of complete 20-pot and 25-pot kits, and Easy Drip bags, are listed on B&Q’s website as online-only or marketplace stock — often not on the aisle next to the hosepipes. Some stores may have a Hozelock timer. The feeling that you can get Hozelock locally is still commercially real: garden centres, Screwfix, and Amazon next-day do the work. The feeling that every B&Q aisle has a blister of 4 mm tees is often false.
Our path is another kit from the site, or a generic ½-inch push-fit from a plumbing aisle, plus [email protected]. The site states 12-month UK support and free UK delivery. There is no garden-centre SKU to invent, and the parts are not sold as Hozelock-compatible. If spare-parts-in-person is the deciding vote, Hozelock wins.
Short answers before you order either box
Are the brass heads pressure-compensating?
No. Hozelock’s 20-pot and 25-pot stakes are listed as 4 LPH pressure-compensating. DripSystem UK’s heads are adjustable. On a slope, or with mixed pot heights, twist each cap. Do not expect the last plant to match the first automatically.
Can I water through a hosepipe ban?
Check your water company. DripSystem UK does not claim Temporary Use Ban approval. Hozelock’s reducer-and-drip positioning is their statement about their kit. A missing reducer on our box is not an exemption.
Will this run from a water butt?
Not as a gravity feed. Hozelock sometimes markets the Select Controller with a butt. Ours is tap-first. A water butt usually needs a pump, and some outdoor taps still need a separate BSP adaptor even when the timer offers ½-inch and ¾-inch threads.
Can I mix this with leftover Gardena 4.6 mm?
No. Use Hozelock 4 mm with Hozelock, Gardena 4.6 mm with Gardena, and ½-inch push-fit with this kit.
Two jobs, two boxes
Clustered patio pots, hanging baskets, discreet 4 mm, a reducer in the carton, spare parts you can fetch: stay with Hozelock. The 20-pot is usually cheaper. The 25-pot is the short 13 mm fork — thicker spine, still only 15 m of it.
A pressurised outdoor tap, mixed beds or borders, about twenty planting points, and a run that actually uses 30 m of ½-inch: that is the DripSystem UK job. Timer in the box. No listed reducer or filter. Not a better brand — a longer mainline.