We do not provide installation services, but we can refer you to a qualified and licensed organization to install any of our products. Submit your request here.

Easy, for standard products, just select the appropriate Request for Proposal form, or Contact Us with any custom requirements.

A formal written purchase order is required to process your order. Your purchase order should list the vendor’s name (as shown in our proposal), the total order value, the product’s description and clear instructions on shipment method, desired freight billing method (prepaid and add to invoice, or collect to your account) and a destination address. If a custom product is being ordered, we may provide you with a drawing and may ask for your signed approval prior to fabrication. Please also specify your preferred payment method (see choices here).

Most generator manufacturers maintain websites with comprehensive application and installation guides for their products. You may also visit On-Site Power Advisor for helpful information and design support related to emergency generator ancillary equipment, such as fuel systems, exhaust systems, etc.

Specified.Works is a direct factory sales representative for various equipment manufacturers for a specific geographical area. Most transactions conducted through Specified.Works are direct between you and the manufacturer. In some instances, usually related to replacement spares, Specified.Works may facilitate order processing and billing.

Open account is recommended for customers expecting to conduct repeat business. A credit application is available to apply for Net 30 Terms. For small or one-time orders, most of our principals accept credit cards and wire transfers, depending on the order value. When requesting a price quote, or when placing an order, please specify your preference so we can provide the appropriate information.

Most product specifications and technical data are shown in our Engineering page, but if you are unable to find a specific piece of information, please Contact Us.

Fuel Systems

Sure! Here are the most commonly requested items:

  • Perma-Pipe Type-FS secondary containment piping (EQ#825)
  • Perma-Pipe ULTRA-FS secondary containment piping (EQ#856)
  • PermAlert PAL-AT and LiquidWatch leak sensing devices (EQ#091)
  • Simplex day tanks, cylindrical design only (EQ#677)
  • Simplex day tank level controller (EQ#732)
  • Simplex CAFP and SP Series fuel fill stations (EQ#481 and EQ#706)
  • Simplex FP Series fuel fill stations (EQ#481)
  • Leak Sensor used for Simplex fuel fill stations (EQ#240)
  • Simplex TC-8 Tank Alarm Panel (EQ#902)
  • General Industries PermaTank (EQ#553)
  • General Industries UL-142/STI-F921 fuel storage tank with secondary containment (EQ#677)
  • General Industries Fireguard fuel storage tank (EQ#400)

Can’t find what you need? Please Contact Us.

Per NFPA 110: “Fuel tanks shall be close enough to the prime mover for the fuel lift (suction head) of the prime mover fuel pump to meet the fuel system requirements, or a fuel transfer pump and day tank shall be provided.”

Locating a leak in secondary containment piping is difficult to do in below-ground piping systems, where leaks are collected in a low-point sump. For existing sites, contact your local DEP Division for a referral to an organization that can perform leak location services. For new designs, you may consider a continuous leak monitoring system to pinpoint the exact location of a leak, should it ever develop.

Here’s a Pipe Friction Loss Calculator to help you calculate pressure drop in fuel -oil piping.

Pipe Friction Loss Calculator


  • Viscosity (cP) of #2 diesel fuel: ~3.5
  • Specific gravity of #2 diesel fuel: 0.85
  • Be sure to account for vertical head in your piping run: 1psi = 2.70 feet of #2 diesel fuel with specific gravity of 0.85.

Need to estimate the size of a fuel tank? Here’s a handy Tank Size Calculator Tool!

Tank Volume Calculator

Simplex’s Parts Dept. can be reached at (217) 483-1600 ext 211.

You need a Fuel Fill Station. This article should help you select the right one.

You should consider a Fuel Port with a built-in fuel transfer pump. The Simplex SmartPump is designed to transfer fuel from a fuel delivery truck to one or more remote storage tanks. This On-Site Power Advisor article may be helpful.

You can rely on Simplex to select the pump and motor combination to meet the required flow rate for your project. To do so, Simplex will need the flow rate (GPM or GPH), the specified total dynamic head (TDH) for the fuel piping, and the preferred system voltage. But if you would like to do some of your own calculations, this Pump Selector is very useful. When providing the input variables, try using the following:

Construction: Cast Iron
Sealing Options: Packed/Lip Seal
Viscosity: 50SSU
Differential Pressure: as needed
Temperature: 80F
Specific Gravity: 0.85
Flow Rate: as needed
Max RPM: 1750

When you are presented with pump selections, look for “SG Series” pumps. Also good to know: the 1800 rpm pumps (with 1800rpm motors) are less expensive. The slower-speed 1200rpm pumps are quieter but require more expensive motors.

Once you have arrived at your selection, don’t forget to read this On-Site Power Advisor Article to cover some of the key aspects of good technical specifications for a fuel transfer pump set.

Multiple leaks in an above-ground fuel piping system (especially those that repeat after unions are re-tightened), are often caused by thermal expansion, and the resulting pressure buildup in the piping system.

We recommend 4 steps to prevent generator failures due to poor fuel quality. They can be found here.

We recommend that a fuel filtration cycle be set up to circulate 25% of the fuel tank’s content every week. This schedule would allow some time for suspended contaminants and water to settle to the bottom of the tank, where they can get picked up by subsequent filtration events. Also important, a fuel maintenance system should be selected with a fuel circulation pump of sufficient flow capacity to complete a cycle within an 8-hour period. This would allow for a filtration event to be supervised from start to finish by an employee within a single work shift.

The design engineer for the overall piping system can provide this information since the pump’s outlet pressure is determined by the site piping, not the pump itself. A pump will develop whatever pressure is required to overcome the static and dynamic head of the piping system. Unless otherwise directed, our standard practice is to size the motor so that the pump can deliver a minimum of 50 PSI, without the motor being overloaded. If the design engineer requires a higher pressure, the motor size may need to increase.

The maximum vertical lift capacity of a positive-displacement pump is approximately 15′-18′. The pump should not exceed 15″Hg of vacuum.

If an engine-mounted pump is unable to draw fuel from a day tank, it is most likely because of:
1. The day tank location and the associated piping layout require suction that is beyond the capacity of the engine-mounted fuel pump (the engine data sheet will show the max suction head for the pump, and also the max discharge pressure for the return side of the pump – these are not very strong pumps). You can relieve excessive restriction by minimizing or eliminating piping elements that are not absolutely necessary (foot valves inside the day tank suction line, excess elbows, etc.).
2. Air is getting into the fuel line and keeping the pump from creating suction. A sight glass in the piping may help determine if air is coming into the line. Tighten all connections that may be allowing air intrusion.
3. The engine’s inline fuel filters (if any) are clogged and not allowing flow to the engine.
4. The engine-mounted pump is in need of service or replacement. You can add a vacuum gauge on the piping between the engine and day tank to measure the pump’s performance.

Exhaust Systems

Consider using a Disk-style silencer with flush-mounted flanges, and shorter expansion bellows instead of the typical flexible connectors. If still unable to clear the ceiling height, call us to discuss a custom design.

Yes, we can help. Contact Us with your details. We will need to know the following:

  1. what is the engine manufacturer, model and rating? Or…
    1. what is the maximum pressure drop allowed by the engine?
    2. what is the engine’s exhaust gas flow rate?
  2. what is the attenuation level for the intended silencer (in dBA) or the silencer attenuation grade (critical, hospital)?
  3. what size piping are you trying to use downstream of the silencer? If unknown, we will suggest the appropriate pipe size?
  4. what is the expected total/overall length of pipe for the exhaust piping?
  5. how may 90° elbows and 45° elbows do you anticipate having in the piping downstream of the silencer?

No, exhaust silencer attenuation grades (critical, residential, etc) are not regulated by any industry standard. This means that a given manufacturer’s “critical grade” silencer may perform differently from an equally-labeled product from a competing manufacturer. Whenever possible, it is best to specify sound attenuation requirements in terms than can be measured (i.e. silencer shall provide 25dBA overall noise reduction).

Try this directory.

We haven’t used it ourselves, but we hear good things about Deacon 3100.

RICE NESHAP is an acronym for the latest EPA regulations affecting stationary gas and diesel engines. Learn more here.

Flexible connectors consist of a 321 stainless steel hose terminated with couplings or flanges. They are generally between 18″-24″ long, and designed to absorb vibration between the engine exhaust manifold and the engine silencer. Steel expansion bellows feature a single-ply or multiple-ply corrugated 304 or 321 stainless steel construction, and are specifically designed to absorb axial movement. While flexible connectors allow 0.25″ axial deflection per 12″ length, an expansion bellows often provides 1.5″-3″ deflection in a 12″ length. We recommend the installation of flexible connectors at the engine outlet connection. Expansion bellows should be installed in piping downstream of the silencer, where the piping changes direction.

Ventilated thimbles are mandated by NFPA-37 where exhaust piping penetrates through combustible walls or combustible roofs. Even in seemingly “non-combustible” walls/roofs, it may be a good idea to provide an insulated thimble to protect against burning of roof sealers, coatings, stucco, etc. Wall and roof thimbles are available in carbon steel or stainless steel. You may request a proposal for a wall or roof thimble here.

Electrical Systems

Yes, our Surge Suppression Protection (SSP) option provides a 40kA-rated SPD, pre-installed in the ATS enclosure. Other ratings can be specified to meet your requirements.

A 4 pole transfer switch is required if your generator will be considered a “separately-derived system”. This article should be helpful.

Connecting a permanent load bank to an emergency generator can be done in several ways. This Technical Brief illustrates a few methods that should address most installations. For connection of portable load banks to a permanent generator (for temporary testing), you should consider a load bank connection cabinet.

Lake Shore Electric’s Parts Dept. can be reached at (440) 232-0200 Ext. 224.

Cooling Systems

Yes, an engine with a charge-air cooled circuit can be configured with a remote cooling system. See this article for details.

Fuel flow rate expected to flow through the cooler (at full load): _____ gpm (gallons per minute)
Heat load rejected to fuel (at full load): _____ btu/min
Operating ambient temperature for the fuel cooler: ____ F
Maximum fuel cooler outlet temperature: ____ F

The spacing between adjoining remote radiators should equal 1.5-times the radiator’s fan diameter.  For example, two radiators with 6′ diameter fans should be installed with 9′ spacing between them. The purpose of this spacing is to avoid hot air re-circulation, which would result in decreased cooling performance.