Try these curated collections

Water pipes icon of 3 types: color, black and white, outline. Isolated vector sign symbol.
Plumber related icons: thin vector icon set, black and white kit
Pipes and fittings, tap. Vector icons lineart. Sewage and Drainage
Simple Set of Plumber Related Vector Line Icons. 
Contains such Icons as Leaking Washing Machine, Water Heater, Tool Box and more.
Editable Stroke. 48x48 Pixel Perfect.
Editable thin line isolated vector icon set - scales weight, funnel, nail, loading, crane, anchor, safe, fridge, toaster, stands for knives, magnetic field vector, ladle, pipes, metal rolling, pan
Set of black details pipes
Tee pipe icon. Simple illustration of tee pipe vector icon for web
Pipe icon and flange fitting. Include control valve and pressure gauge or manometer. For pipeline construction and transportation liquid or gas.
Pipe icon for pipeline construction and industry work.
Pipes vector icon
Valve, taps, pipe connectors, pipe details vector icons set. Set of pipe and tube with valve illustration
set of black isolated plumbing pipes icon
Metallurgy products icons set
Drain icon vector. Trendy flat drain icon from construction and tools collection isolated on white background. Vector illustration can be used for web and mobile graphic design, logo, eps10
Steel pipe connector and valve for plumbing and piping work, vector line icon set.
Pipeline construction, maintenance and repair vector icon. By crane, worker, welder and welding work. For transportation or supply crude oil, natural gas, gasoline or petroleum in industrial plant.
Water pipeline line icon for web, mobile and infographics. Vector dark grey icon isolated on light grey background.
Worker and pipeline vector icons
Set line icons of plumbing
Pipeline construction, maintenance and repair vector icon. By crane, worker, welder and welding work. For transportation or supply crude oil, natural gas, gasoline or petroleum in industrial plant.
Pipes icon
Pipe Icon, Pipe Fitting Icon, Water, Gas, Oil Pipeline, Plumbing Work Vector Art Illustration
From the pipe flowing liquid into the river, black on white background, vector
Metallurgy icons set. Illustration EPS10
Heavy industry icons. For you design
Pipe Icon, Pipe Fitting Icon Vector Art Illustration
Pipe Icon, Pipe Fitting Icon, Water, Gas, Oil Pipeline, Plumbing Work Vector Art Illustration
Isometric pipes, fittings, valve and meters vector icon set in thin line style
Plumbing and Sanitary Equipment Line Icons contains Toilet, Sink, Bathtub, Pipe, Water Meter and more. Editable Stroke. 48x48 Pixel Perfect.
Pipe with valve icon
Pipe icon vector
water icon
Steel structural product such as beam tube and pipe variety of shape for construction material, Steel construction material, Product of iron and steel industry, vector illustration icon set design.
Plumbing, sewerage, pipe, faucet thin line vector icons set
Broken water pipe linear icon. Thin line illustration. Plumbing. Contour symbol. Vector isolated outline drawing. Editable stroke
Clean water flow out to river icon. Wastewater after treatment process result in clean water. Vector illustration icon design. Water treatment removes contaminants and undesirable components. 64x64px
Metallurgy products icons set
Pipe icon and flange fitting. Include control valve and pressure gauge or manometer. For pipeline construction and transportation liquid or gas i.e. crude, oil, natural gas, sewage, wastewater etc.
Pipe icon vector
Water pipe icon. Cartoon illustration of water pipe vector icon for web design
Wastewater line icon
Valve and Taps icon set
Burst oil pipe line icon, crack and plumber, oil leak sign, vector graphics, a linear pattern on a white background, eps 10.
Burst pipe and water leak or plumbing problem and repair work vector icon set design.
Icons set Plumbing
Pipeline construction, maintenance and repair vector icon. By crane, worker, welder and welding work. For transportation or supply crude oil, natural gas, gasoline or petroleum in industrial plant.
Set line icons of house systems
Details pipes different types collection of water tube industry gas valve construction and oil industrial pressure technology plumbing vector illustration.
Dripping water pipe icon, trumpet break in cartoon style on white background. Vector illustration of penetration plumbing. Pixel perfect icons optimized for both large and small resolutions.
Electric icons set. Set of electric cable, pvc pipes, led lamps and spot lights, relay, electrical products.
Vector icon of steel pipe and metal product  for construction industry work.
Set vector water icons grey on white background
Environmental pollution icons, strokes editable
Steel pipe and beam product  for construction industry work, vector line icon set.
Pipe icon vector
Vector black  plumbing  icons set
Burst pipe and water leak or plumbing problem and repair icon such as burst, leaking, noise and frozen at water supply pipe, faucet, valve control, fitting, connector, meter and underground location.
Steel structural product such as beam tube and pipe variety of shape for construction material, Steel construction material, Product of iron and steel industry, vector illustration icon set design.
Steel pipe and roll steel metal product vector icons. Profile and bar, roll and pipe steel for construction illustration
Ware pipes System Flat Concept in Black and White Color Vector Illustration
Line icons set for Oil industry
Plumbing Icons Set on White Background. Vector
Stack of pipes black silhouette 3d perspective icon
Sanitary engeneering, valve, pipe, plumbing service objects icons collection. Faucet and plumbing valve, pipe water and tube for drain. Vector illustration
Pipe fittings vector icons set. Tube industry, construction pipeline, drain system. Pipe fittings vector
PVC or plastic pipe fitting vector icon. Include straight, nipple, reducer, elbow, tee, valve. For connection many size of tube pipe in pipeline for plumbing, drainage system, sewage and water supply.
Plumbing icons
Sanitary sewer pipe or underground pipe gutter and tunnel system for transportation sewage and wastewater from house, Manhole cover or removable steel plate forming for access underground.
vector black industry icons set on gray
Set of tobacco pipes. Icon collection of pipes isolated silhouettes
Sewer pipe icon, 64x64 perfect pixel and editable stroke.

Search for "pipe icon" in these categories

Oil industry icons
Broken water pipe glyph icon. Silhouette symbol. Negative space. Vector isolated illustration
Vector icons pack - Green Series, house collection
Pe pipe and connector joint for construction work vector icon design for pe pipe graphic design element work.
Sewer pipe icon for drainage system, editable stroke.
Linear Oil and Gas Icons Set
Plumbing service vector flat line icons. House bathroom equipment, faucet, toilet, pipeline, washing machine, dishwasher. Plumber repair illustration, thin linear signs for handyman services.
flat Vector icon - illustration of water pipe icon
Pipes and pipeline fittings vector icon set in thin line style
Natural gas icons set.
Plumbing pipes outline vector icon. Thin line black plumbing pipes icon, flat vector simple element illustration from editable construction concept isolated on white background
Leak line icon
Wastewater line icon
outline plumbing vector icon. isolated black simple line element illustration from tools concept. editable vector stroke plumbing icon on white background
pipe icon illustration isolated vector sign symbol
PVC plastic pipe fitting vector icon. 3 way (tee) reducer. Consist of slip socket opening 3 end (solvent weld). Installation part for pipeline, plumbing, drainage, vent, waste, sewage and water supply
Pipe icon and flange fitting. Include control valve and pressure gauge or manometer. For pipeline construction and transportation liquid or gas i.e. crude, oil, natural gas, sewage, wastewater etc.
Vector icon set pipe parts. Simple silhouettes of tubes, valves, taps and pipe connectors. Pipeline and sewer systems.
Water supply pixel perfect linear icon. Urban resource management. Sanitation pipe system. Thin line customizable illustration. Contour symbol. Vector isolated outline drawing. Editable stroke
Pipe glyph icon. Silhouette symbol. Negative space. Raster isolated illustration
Purple Icon of Pipe. Eps-10.
Plumbing pipes vector icon in black solid flat design icon isolated on white background
pipes sign. pipes icon
Vector design of pipe and tube symbol. Set of pipe and pipeline stock vector illustration.
PE pipe and part vector icon such as connector, fitting, joint welding, saw cutting, and pipe material for distribution water or electrical cable protection, black silhouette icon.
pipe icon isolated sign symbol vector illustration - high quality black style vector icons
Pipes and fittings, tap. Vector icons lineart. Sewage and Drainage
Hot rolled steel outline icons set. Set of metal products, steel angle, channel, rail, i beam, flat metal bar, steel tube, pipe, expanded metal, perforated sheet, bar grating, rebar, wire mesh icon
Burst pipe and water leak or plumbing problem and repair icon such as burst, leaking, noise and frozen at water supply pipe, faucet, valve control, fitting, connector, meter and underground location.
Simple Set of Oil Related Vector Line Icons. 
Contains such Icons as Gas Station, Oil Factory, Transportation and more.
Editable Stroke. 48x48 Pixel Perfect.
Vector illustration of pipe and tube sign. Set of pipe and pipeline stock vector illustration.
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