Gem Oil Tank Sight Level Gauge

For bottom outlet tanks



ex. VAT


  • O
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  • K
  • AdBlue
  • Air
  • Antifreeze
  • Any
  • Chemical
  • Diesel
  • Grease
  • Jet Fuel
  • Kerosene
  • Oil
  • Petrol
  • Rapsoil
  • Water
  • Windscreen
  • B2

About the product

The Gem Oil Tank Sight Gauge is a traditional, cost effective type of heating oil tank gauge generally used in domestic properties. It is a simple pull to read oil tank level indicator that gives an instant measurement of the tank’s contents, that benefits from an integrated paper filter with alloy bowl for easy removing and cleaning. This oil tank level gauge has an incorporated isolation valve to that it can be serviced or replaced without having the drain the entire tank of fuel.

Designed to fit the bottom outlet of both steel and plastic tanks, and complete with a multi-directional outlet so that it can feed up to two boilers, the Gem fuel tank gauge is suitable for a range of applications.

Features of the Gem Oil Tank Sight Level Gauge:

  • Bottom outlet oil tank gauge
  • Corrosion resistant zinc plated brass body
  • Removable alloy bowl paper filter
  • Isolation valve for easy servicing
  • ½” M BSP inlet
  • Available in 4ft 6”
  • C/w gauge level marking kit & calibration labels

Product Models and Features

GEM1004Gem Oil Tank Sight Gauge 4ft 6" x 1⁄2"

Replaces Code: GEM1000A

Tank Height (ft/mm): 4'6/1371

Inlet: 1/2" M BSP

Primary Outlet: 3/8" F BSP x 10mm Comp

Secondary Outlet: 3/8" F BSP

Tube Support: Aluminium

Tubing: PVC

Filter: 40micron - paper

£81.75 ex. VAT

Product Accessories


Gem Filter Service Kit

40 micron

Filter and O ring

£7.35 ex. VAT

Threaded Connector 1" M BSPT x 1⁄2" F BSP - Aluminium 90mm

Inlet: 1" M BSPT

Outlet: 1/2" F BSP

Length (inches/mm): 3 1/2 / 90

£5.65 ex. VAT

Oil Tank Sight Gauge PVC Tubing 30mtr Coil

Inlet: 9.6mm ID/ 15mm OD


£52.50 ex. VAT

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How does this heating oil tank gauge work?

The oil tank sight gauge works using the gravity effect on fluids to give visual representation of the tank level. This heating oil tank gauge uses either a push or pull to read button or handle to only open the valve until the fluid level has settled. When you let go of the button or handle it goes back to a closed position. This means that next time a level needs to be taken the button or handle needs to be activated again. However, when checking the heating oil thank level the sight gauge valve has to be naturally closed to ensure against leaks in case the tube is damaged.

What makes the GEM a more sophisticated sight gauge compared to other models?

The Gem oil tank sight gauge comes with 40-micron paper filter with alloy bowl and an isolation valve to allow it to be serviced without draining the tank first. In addition, this oil tank level gauge is multi directional so fuel can be taken from left or right, which means that it can also feed two boilers.

How often will I need to replace the filter in my GEM oil tank sight gauge?

The replacement of the oil heating filter will depend on several factors including the quality of the fuel, the usage of fuel, the weather, the age and condition of the fuel tank. For example, if your tank is old and has not been cleaned out, then fuel filters can clog quicker and slow the flow rates down. If you have a high fuel usage then filters would need changing more often. We would advise changing the filter elements at the start and end of the winter period to ensure smooth service, or a minimum at your annual tank service.

How accurate are oil tank sight gauges?

This oil tank sight gauge/ oil tank float gauge is cost effective and provide a good ideation of the content levels, but it is not as accurate as some of the more sophisticated tank gauges. If a higher level of accuracy is desired you might need to consider some of our more advanced models such as Unitel gauge suitable for both diesel fuel and oil heating, Piusi Ocio fuel tank gauge perfect solution for diesel and Apollo oil heating tank gauge for heating oil.

Can I use an oil tank sight gauge on a plastic heating oil tank?

The simple answer is yes you can. When installing the oil tank sight gauge on a plastic tank that has a recessed outlet point you will have to fit an extension before the sight gauge to bring the tube flush with the outside of the tank, so it doesn’t bend around the outside of the tank.

If you are buying for resale and have volume enquiries, contact our sales team for pricing by clicking on the below product enquiry button or calling us on +44 (0) 121 351 4445.

Alternatively, visit our trade customers page where you can download account forms to apply for a credit account and receive exclusive trade benefits if approved including trade pricing.

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