Name: WaterBoost WB-Fixed 500 Litre Slimline 2309310
Brand: WaterBoost
SKU: wbkslimline-500-dtron-1
Price: 944.1 GBP
Availability: InStock

WaterBoost WB-Fixed 500 Litre Slimline 2309310

WaterBoost WB-Fixed 500 Litre Slimline 2309310 - Image 2

WaterBoost WB-Fixed 500 Litre Slimline 2309310 - Image 3

WaterBoost WB-Fixed 500 Litre Slimline 2309310 - Image 5

WaterBoost WB-Fixed 500 Litre Slimline 2309310 - Image 6

Established 1975
Trusted by thousands of customers

The WaterBoost WB-Fixed 500 Slimline is a complete, pre-assembled fixed-speed water boosting system designed as a cost-effective solution to low water pressure or restricted flow in 3–5 bedroom homes. A 500-litre WRAS-approved slimline tank (700mm dia × 1500mm high) pairs with the DAB Dtron2 internal fixed-speed pump, delivering a reliable 50 l/min at 3 bar.

The DAB Dtron2 sits submerged inside the tank — no external pump unit required, keeping the footprint to the tank’s 700mm diameter. The tank connects directly to the mains via the pre-fitted ¾” ball float valve. Fully pre-assembled — no site build required.

Supplied with ¾” ball float valve and By-law 30 kit. The tank carries a 5-year warranty and the DAB Dtron2 pump a 3-year warranty. Please contact us for delivery timescales.

50l/min

@ 3 bar

500L

Tank storage

1500mm

Tank height

5yr

Tank warranty

WRAS tank & pump
Internal pump
Direct mains
Pre-assembled
3yr pump warranty
3–5 bed homes

Full Description

More about this product

Full Description

Product overview

The WaterBoost WB-Fixed 500 Slimline is the larger fixed-speed model in the WB-Fixed slimline range. A 500-litre WRAS-approved slimline tank (700mm diameter × 1500mm high) pairs with the DAB Dtron2 internal fixed-speed pump, delivering a consistent 50 l/min at 3 bar. Designed for 3–5 bedroom homes where maximum overnight buffer storage is important or mains flow is very slow.

The Dtron2 sits submerged inside the tank — no external pump unit needed. The mains supply connects directly via the pre-fitted ¾” ball float valve. Fully pre-assembled with no site build required. The 700mm diameter tank fits into a standard garage, utility room, or plant room space.

Supplied with ¾” ball float valve and By-law 30 kit. 5-year tank warranty and 3-year DAB Dtron2 pump warranty. Please contact us for delivery timescales.

50^l/min

Flow @ 3 bar

500^L

Tank storage

1500^mm

Tank height

5^yr

Tank warranty

Tank & pump WRAS approved · Direct mains · Pre-assembled

What’s included

DAB Dtron2 pump

Fixed speed internal pump — submerged inside the tank. Delivers 50 l/min at 3 bar. WRAS approved. Pre-fitted plug. 3-year DAB warranty.

500L slimline tank

WRAS-approved 500-litre upright slimline tank — 700mm dia × 1500mm high. Pre-fitted ¾” ball float valve and By-law 30 kit. Fully pre-assembled. 5-year tank warranty.

Key features

50 l/min @ 3 bar

Reliable fixed-speed performance for 3–5 bedroom homes — sufficient for multiple simultaneous showers, taps, and appliances.

Internal pump — submerged in tank

DAB Dtron2 sits inside the tank — no external pump unit, compact footprint, naturally quiet operation.

500L maximum buffer storage

Largest buffer in the WB-Fixed slimline range — ideal for very slow-filling mains supplies where overnight storage is critical.

Direct mains connection

Tank fills automatically via the pre-fitted ¾” ball float valve. Minimum 0.5 bar incoming pressure required.

Fully pre-assembled

Arrives ready to install — no site assembly required. Supplied with ¾” ball float valve and By-law 30 kit.

WRAS approved — potable water

Both tank and pump carry WRAS approval — fully compliant for potable water use in the UK.

5-year tank + 3-year pump warranty

5-year warranty on the WRAS slimline tank and 3-year DAB manufacturer warranty on the Dtron2 pump.

Cost-effective fixed-speed solution

More storage than the Powertank SLIMLINE 450 at a lower price — with higher flow, internal pump, and named warranties.

Also available in 300L

The WB-Fixed 300 Slimline (£691.65 + VAT, 600mm × 1200mm) uses the same DAB Dtron2 pump with 300L storage at a lower price.

Typical applications

3–5 bedroom homes with very slow mains

500L provides maximum overnight fill buffer — ideal where mains flow is very slow and 300L may not fill sufficiently overnight.

High daily demand properties

Where higher usage throughout the day means a larger reserve is needed to maintain consistent pressure at all times.

Garage, utility room, plant room

700mm diameter fits in standard domestic spaces. Pre-assembled and straightforward to site in a dedicated utility space.

Budget-conscious installations

Reliable DAB Dtron2 fixed-speed performance at an accessible price — where variable speed or WiFi are not required.

Combi boilers and unvented cylinders

Provides 50 l/min @ 3 bar to maintain the mains pressure required for combination boilers and unvented hot water systems.

Water Regulations compliance

Tank and ball float valve provide the required break between mains and pump — fully compliant with Water Regulations.

Technical specifications

DAB Dtron2 pump

Flow rate	50 l/min @ 3 bar
Pump type	Fixed speed — internal (submerged)
Supply	240V, 50Hz — pre-fitted plug
WiFi / app	No
WRAS	Yes
Warranty	3 years (DAB)

Slimline tank

Capacity	500 litres
Dimensions (dia × H)	700mm × 1500mm
Mains inlet	Direct — ¾” BSP ball float valve
WRAS	Yes — WRAS-approved material
Assembly	Fully pre-assembled
Min inlet pressure	0.5 bar recommended
Warranty	5 years

How it compares

Three boosting systems in the 450–500L range with fixed-speed pumps. The WB-Fixed 500 is the best-value option — more storage, higher flow, named warranties, and the lowest price of the three. The Powertank 450 Fixed offers Fluid Category 4. The Salamander TankBoost is a different tier entirely — 80 l/min for high-flow applications at a premium price.

Feature	WB-Fixed 500 Slimline this product	Powertank SLIMLINE 450 Fixed	Salamander TankBoost 450L
Tank capacity	500L WRAS upright	450L WRAS upright	450L — Vertical
Pump type	Fixed speed (DAB Dtron2 — internal)	Fixed speed (Presflo Multi — external)	Fixed speed (SS submersible — internal)
Flow rate	50 l/min @ 3 bar	40 l/min @ 3 bar	80 l/min @ 3 bar
Pressure vessel	None (fixed speed)	Yes — 3L integral	Yes — 8L
WRAS	Yes — tank & pump	Yes — tank & pump	Not stated
Fluid Category	Cat 1–3 (potable)	Up to Cat 4	AB version available for Cat 5
Plug supplied	Yes — pre-fitted	Yes	No — 8m cable only
Tank warranty	5 years	Contact us	Contact us
Pump warranty	3 years (DAB)	Contact us	Contact us
Price (ex VAT)	£786.75	£818.55	£1,512.00

Which should I choose?
WB-Fixed 500 Slimline — the best-value fixed-speed option at £786.75 + VAT. More storage (500L vs 450L), higher flow (50 vs 40 l/min), WRAS confirmed, named 5yr tank and 3yr pump warranties, pre-fitted plug — at the lowest price. Ideal for potable water boosting in 3–5 bedroom homes where maximum buffer storage is needed.
Powertank SLIMLINE 450 Fixed — choose for Fluid Category 4 compliance. 450L, 40 l/min. £818.55 + VAT.
Salamander TankBoost 450L — a different tier at £1,512 + VAT. The stainless steel submersible pump delivers 80 l/min — significantly higher flow — and includes an 8L pressure vessel. Note: plug is not supplied (8m cable only), WRAS status is not stated on the product page, and the landscape format (1670 × 600 × 640mm) requires different siting. Choose if 80 l/min is specifically required and the higher price and format suit your installation.

Frequently asked questions

How much does it cost and how is it delivered?

£786.75 + VAT (£944.10 inc VAT). Please contact us via WhatsApp or phone for delivery timescales on this product.

What is the difference between the 300L and 500L WB-Fixed models?

Both use the same DAB Dtron2 pump delivering 50 l/min @ 3 bar. The difference is purely storage. The 300L (£691.65 + VAT, 600mm dia × 1200mm high) suits most 3–5 bedroom homes with a moderate mains fill rate. The 500L (£786.75 + VAT, 700mm dia × 1500mm high) is the better choice if your mains fills very slowly or your daily demand is exceptionally high and you want maximum overnight buffer storage.

How does the mains connection work?

The mains supply connects directly to the tank via the pre-fitted ¾” ball float valve. The tank fills automatically. The Dtron2 draws from the tank and boosts pressure throughout the property. A minimum of 0.5 bar incoming pressure is required.

Should I choose fixed speed or variable speed?

Fixed speed (this product) is simpler, lower cost, and delivers consistent 50 l/min @ 3 bar. It’s a strong choice where steady reliable boosting is needed without a premium for added features. Variable speed (the WB-INT Slimline 500 at £1,117.75 + VAT) uses the DAB Esybox Diver — up to 100 l/min, 5 bar max, adjusts to match demand, and includes WiFi, DConnect app, Google Home, and Alexa. Upgrade if higher flow, energy efficiency, or smart home integration are priorities.

What warranties are included?

5 years on the WRAS slimline tank and 3 years DAB warranty on the Dtron2 pump, when purchased from Anglian Pumping Services.

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Delivery Information

Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.

Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).

Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.

Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.

Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.

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