The FlexiGas 28mm Double Sleeved Flexible Gas Pipe (DS-28) – 25m Box is a pre-sleeved, twin-layer CSST gas pipe that passes through 100% of installation scenarios straight out of the box — solid walls, solid floors, screed, soil and unvented voids — with no additional sleeving on site. Certified under the BSI Kitemark scheme (KM 598726) and manufactured to BS/EN 15266, it bends easily by hand for long continuous runs that install up to 4x faster than copper or rigid steel.

✔ Built-in sleeve to BS 6891 & IGEM/UP/2, 3 & 7  |  ✔ EN 1775 Annex A & B fire tested  |  ✔ 130+ compatible FGLink™ fittings  |  ✔ Free roll of silicone tape included

Key Features

• Patent-pending pipe-in-pipe design — inner corrugated stainless steel gas pipe with yellow PE cover, inside a V0 fire-rated corrugated sleeve in slidable configuration, so the CSST can be inserted and withdrawn.
• Every scenario covered — meets the definition of a sleeve in UK regulations (BS 6891 & IGEM/UP/2, 3 & 7): run it through solid floors, solid walls and structural elements, earth/soil, screed, unventilated voids and unventilated risers (small annulus allows direct clipping).
• Fast, flame-free installation — bends by hand into continuous runs with far fewer joints and potential leak points; no soldering, sealants or specialist tools required.
• Secure metal-to-metal seal — compatible with the full FlexiGas™ FGLink™ range of 130+ dezincification-resistant brass fittings.
• FG Bond™ ready — pair with the integrated earthing terminal (certified to BS 951:2009) for quick, tidy electrical bonding.
• Easy on site — metre-marked tubing, high-visibility yellow jacket and 1x free roll of silicone tape in every box.

Specifications

Ideal For

Gas Safe engineers running 28mm gas supplies on larger domestic and light commercial jobs — longer boiler runs, range cookers and higher-demand appliances — through walls, floors, screed or unvented areas. Team it with FlexiGas DS end caps and FGLink™ fittings for a neat, fully compliant finish.

At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.

🆓 Free Local Delivery (Orders £60 & above)

We offer FREE delivery on orders £60 or more for selected local areas.

Eligible Postcodes Include:

• RG*
• SL*
• OX10*, OX11*, OX49*
• HP1*, HP3*, HP8*, HP9*, HP10*, HP11*, HP12*, HP13*, HP14*
• WD*, HA*, UB*, TW*, KT*
• W1* – W9*
• NW*, SW*

Delivery Time: 2–4 working days
Shipping Cost: £0.00

📦 Standard Shipping (Weight-Based Rates)

For orders that do not qualify for free delivery, standard shipping rates apply based on total cart weight.

• For cart weight between 0–5 kg, the shipping cost is £2.99 with a delivery time of 2–4 working days.
• For cart weight between 5–25 kg, the shipping cost is £7.99 with a delivery time of 2–4 working days.
• For cart weight between 26–40 kg, the shipping cost is £15.98 with a delivery time of 2–4 working days.
• For cart weight of 41 kg and above, the shipping cost is £31.96 with a delivery time of 2–4 working days.

🧱 Block Salt (Harvey’s) – Unit-Based
Shipping

This rate applies only to Harvey’s block salt products.

• £7.99 is charged for every 3 items.
• The charge increases by £7.99 for each additional set of 3 items.

Examples:

• 1–3 items → £7.99
• 4–6 items → £15.98
• 7–9 items → £23.97

Delivery Time: 2–4 working days

📏 Large / Long Items (Length-Based Shipping)

For oversized items where the product length is 1.5 metres or more:

Conditions:

• Product length ≥ 1.5 m
• Cart weight ≤ 40 kg

Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days

Collection from Store

Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge.

For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.