WASP W-15 Range


The 4 port high performance WASP W-15 series is a compact and simple to install fuel filter/water separator providing protection from water and particulate commonly found in diesel fuel.



Fuel flow is up to 150 litres per hour together with a water separation efficiency greater than 98% and a pressure drop of only 20 mbar offering minimal restriction to fuel flow.

Either transparent or metal bowl options are available and all models are fitted with a washable stainless steel element which means no replacement elements.

Installation is before the fuel lift pump ensuring full system protection with two port sizes available,  ½'' x 20 UNF/SAE & M14 x 1.5.


  • Aluminium die-cast filter head/ bracket for easy installation.
  • Transparent (Trogamid® T5000) or aluminium bowl options.
  • Pleated stainless steel washable element, surface area 50 cm2.
  • Thumb screw plug to drain water and impurities from bowl.
  • Ball valve to drain water and impurities from bowl (optional on transparent bowl models only).



How does it work?

The WASP W-15 series has three stages of operation

1. Separation:  
The incoming flow of fuel oil changes velocity and direction, reducing the possibility of further reduction of any water droplets present through impact. 

2.  Coalescence:   
This takes place on and just below the flow dispersion member allowing the separated water to descend to the bottom of the filter bowl. 

3. Filtration:   
The fuel finally passes through the stainless steel filter element. This removes all particulate above 100 micron still suspended in the fuel after the separation process.


Product Range

W-15 range Filtration (micron) Details
W-15ST.85.01 100mic stainless steel 1/2" x 20 UNF ports, clear bowl, drain plug
W-15ST.85M 100mic stainless steel M14x1.5 ports, clear bowl, drain plug
W-15ST.85.01B 100mic stainless steel 1/2" x 20 UNF ports, clear bowl, drain tap
W-15ST.85B 100mic stainless steel M14x1.5 ports, clear bowl, drain tap
W-15ST.85Mpps 15mic paper M14x1.5 ports, clear bowl, drain plug
W-15ST.85pps 15mic paper extended length M14x1.5 ports, clear bowl, drain plug
W-15ST.85MN 100mic stainless steel M14x1.5 ports, metal bowl, drain plug
W-15FS    Fuel stop  Stops fuel flow if water level is too high

Spares and options

W60450/0015P Standard replacement 15 mic paper element (all inc 85Mpps, except 85pp)
W60200/0015P Replacement extended paper element (15 micron) for 85pps model only
W60450/01 Replacement 100 mic stainless steel element
W-3195 Replacement seal kit for W-15 with paper element
W-3199 Replacement seal kit for W-15 with stainless steel element



Servicing and Technical Specification



  1. If necessary refit the two port plugs supplied with the filter. If they are not to be repositioned check they are correctly tightened.
  2. Follow the flow direction according to the arrows on each of the four ports.
  3. This range of filters should be installed on the suction side of the fuel supply system before the lift pump.


  • Check regularly for separated water
  • Drain off any separated water or impurities regularly via the thumb screw drain plug or valve
  • Remove, clean and re-fit the stainless steel element as necessary
  • replace paper element when required, see above spares

Click for product support and servicing page


Maximum flow rate 2.5 Lts/min (150 L/Hr)
Connections 1/2''-20 UNF or M14x1,5
Pressure tested to 2 bar
Environment temperature range -20°+120 °C
Filtering Degree 100 micron

WASP Fule Filter SeparatorsWASP Fule Filter SeparatorsWASP Fule Filter Separators



Need help selecting a filter?

See our guide to help you select the most suitable filter for your needs.

Technical Support

How it works

See how the Separ filter works to separate water and particulate from fuel. 

SWK2000 flow diagram transparancy

How to Order

Call or email us to place your order. We accept ALL major credit and debit cards, bank transfer and also PayPal. 

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Expert advice

Unsure which spare parts you require? Or if a Separ filter will meet your requirements? 

Talk to our expert team. Call 01923 276 007



Delivery options

We have a wide range of shipping options available to suit your destination and budget.



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Contact Us

3 Kingley Park, Station Road, Kings Langley, Herts, WD4 8GW

Tel: +44 (0)1923 276007

Fax: +44 (0)1923 267463

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Here to Help

Product guides

Fuel Specs


Selecting a Filter