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Adapter (216)
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Branch (38)
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Connector (30)
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Solder Ring Pipe Reducer (27)
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Soil Pipe Coupling (26)
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Coupler (25)
Basin Waste (24)
End Cap (23)
Pipe Ring (23)
Pushfit Flexible Tap Connector (23)
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Threaded Tee (23)
British Standard Gate Valve (22)
Hexagon Nipple (22)
High Pressure Float Valve (22)
Part 1 Float Valve (22)
Pipe Boss (22)
Waste Pipe Coupling (22)
Air Admittance Valve (21)
Flexible Pan Connector (21)
Shower Trap (21)
Soil Pipe Tee (21)
Solder Ring Tee (21)
Plasson MDPE Reducer (20)
Threaded Socket (20)
Ventilation Grill (20)
Solder Ring Adapter (19)
Bath Waste (18)
Blanking Cap (18)
Bracket (18)
Equal Elbow (18)
Jointing Compound (18)
Louvre Vent (18)
Male Elbow (18)
Pipe Cutter (18)
Plasson MDPE Bend (18)
Single Pipe Ring (18)
Threaded Cap (18)
Chrome Elbow (17)
Fixed Length Radiator Extension (17)
Flexible (17)
Flexible Duct Hose (17)
Hep2O Reducing Tee (17)
Single Pipe Clip (17)
Solder Ring Elbow (17)
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Blue Cold Lever Ball Valve (16)
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Flange (16)
Internal (16)
MDPE Fitting Seal (16)
P Traps (16)
Plasson MDPE Coupling (16)
Push-Fit Stop End (16)
Red Hot Lever Ball Valve (16)
Tooling (16)
Cistern Handle (15)
Cistern Syphon (15)
Flexible Waste Pipe (15)
Hep2O Manifold (15)
John Guest Isolation Valve (15)
Push-Fit Manifold (15)
Round Duct Hose (15)
Speedfit Isolation Valve (15)
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With Overflow (15)
Yellow Gas Lever Ball Valve (15)
Bottom Inlet Fill Valve (14)
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End Feed Adapter (14)
Heat Resistant Sleeving (14)
Pipe to Pipe Flexible Tap Connectors (14)
Plasson Universal Adapter (14)
Soil Pipe Branch (14)
Threaded Gate Valve (14)
Underground Soil Pipe Bend (14)
Bibtap Hose Tail (13)
Brass Olive (13)
Copper Olive (13)
Drain Connector (13)
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Hep2O Adapter (13)
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MDPE Female Adapter (13)
Outdoor Tap Hose Tail (13)
Pushfit Adapter (13)
Solder Ring Coupling (13)
Solvent Weld Waste Pipe Tee (13)
Speedfit Reducing Tee (13)
Air Vent (12)
Backnut (12)
Bathroom Fan (12)
Chrome Coupling (12)
Double Check Valve (12)
Economy Gate Valve (12)
Extractor Fan (12)
Gas Cock (12)
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Offset (12)
Offset Pan Connector (12)
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Slotted (12)
Speedfit Adapter (12)
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Threaded Plug (12)
Ball Float (11)
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Hep2O Demount Tool (11)
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MDPE Coupling (11)
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Polyplumb Reducing Tee (11)
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Side Inlet Fill Valve (11)
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Spanner (11)
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End Feed Bend (10)
Filling Loop (10)
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MDPE Male Adapter (10)
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Part 2 Float Valve (8)
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Shoe (8)
Single Hospital Bracket (8)
Sink Waste With Overflow (8)
Soil Pipe Reducer (8)
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Solvent Weld Waste Pipe Adapter (8)
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Adjustable (7)
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John Guest Stop End (7)
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Liner (7)
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MDPE Tooling (7)
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PushFit Waste Pipe Clip (7)
PushFit Waste Pipe Coupling (7)
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Radiator Key (7)
Rectangular Terminal Guard (7)
Reducing Gas Lever Ball Valve (7)
Running Nipple (7)
Solvent Cement (7)
Speedfit MDPE Adapter (7)
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Straight Filling Loop (7)
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Valve (7)
Angled (6)
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Gas Torch (6)
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Heat Mat (6)
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Hopper (6)
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John Guest MDPE Reducer (6)
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Outlet (6)
Pipe (6)
Plasson MDPE Push-Fit Adapter (6)
Plasson MDPE Push-Fit Stop Tap (6)
Polyplumb Pipe Reducer (6)
Pressfit Stop End (6)
PushFit Waste Pipe Tank Connector (6)
Round Downpipe Bracket (6)
S Trap (6)
Sink Plug (6)
Solder Ring Tap Connector (6)
Speedfit MDPE Reducer (6)
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Squareline Gutter Bracket (6)
Squareline Gutter Outlet (6)
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Standard Drain Connector (6)
Underground Soil Pipe Gully (6)
Unslotted Sink Waste (6)
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White Vent (6)
Anti Draft Vent (5)
Bayonet Cooker Hose (5)
Bibtap with Check Valve (5)
Brass Cross (5)
BSP Adapter (5)
Bucket (5)
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Core Drill Vent (5)
Double Pipe Ring (5)
Duct Bend (5)
Economy Isolation Valve (5)
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External (5)
Gas Restrictor Elbow (5)
Gravity Flap Vent (5)
Immersion Heater Thermostat (5)
Imperial Olive (5)
John Guest MDPE Elbow (5)
John Guest MDPE Stop Tap (5)
John Guest Service Valve (5)
Lever Bibtap (5)
Lever Isolation Valve (5)
Metric Reducing Joiner (5)
Overflow Elbow (5)
Plasson MDPE Pipe Insert (5)
Plasson MDPE Reducing Bush (5)
Polyplumb Adapter (5)
Polyplumb BSP Adapter (5)
Protective Tape (5)
Push-Fit Adapter (5)
Push-Fit BSP Adapter (5)
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PushFit Waste Pipe Reducer (5)
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Solvent Weld Waste Pipe Tank Connector (5)
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2 Port Manifold (4)
3 Port Manifold (4)
90 Degree (4)
90 Degree Fire Valve (4)
Anti-Corrosion Tape (4)
Bath Plug (4)
Bibtap (4)
Black Hole Vent (4)
Bottom Entry Shower Gulley (4)
Chrome Waste Bend (4)
Cistern Washer (4)
Copper To MDPE Fitting (4)
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Garden Tap (4)
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Half Round Gutter Clip (4)
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Hep2O Isolation Valve (4)
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JG SpeedFit Pipe Coil (4)
John Guest Coupling (4)
John Guest MDPE Stop End (4)
John Guest Pipe Reducer (4)
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KeyPlumb Pipe Coil (4)
Lead to MDPE Fitting (4)
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Louvre Vent with Flyscreen (4)
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MDPE Elbow (4)
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Mini Lever Ball Valve (4)
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Filling Loops and Valves

A filling loop is a pipe that is used to connect the mains water supply to the central heating system. If the boiler pressure gets to low, a filling loop can be used to to pressurize the water in the central heating system. They are commonly used in the installation and servicing of boilers. They can also be used when a boiler needs draining or bleeding.