The end suction vertical in-line pump has two main advantages:
- Space Saving
- Lower initial cost
The method of delivering water into the impeller is identical to that which is used by a vertical split case pump; however, the casing is constructed in such a way that the motor is situated on top, and the pump flanges are aligned with the same central lift line (hence the name "in-line"). This takes up the least number of room in the pump chamber and is necessary for centrifugal pumps. These pumps are also available to take advantage of lesser fire pump ratings, such as 50 GPM, 100 GPM, 150 GPM, and so on. The electric motors that they use are typically single-phase. Throughout the course of HSC pump production, ratings as low as 250 GPM and as high as 500 GPM have been used. The GPM pump ratings are improved because of the addition of the vertical pump. The mechanical design of the vertical in-line pump (VIP) is the most cost-effective. In this design, the pump impeller is connected to the motor shaft and is fixed within the pump body. The only shaft that exists is the motor shaft, and there is nearly none in the pump. 
To reiterate, hydraulic balancing is not necessary for water to enter the screw pump; nonetheless, the pump has very little bearing support, making it susceptible to vibration caused by operation. This leads to a restricted use for fire pumps with a capacity of more than 750 GPM. Units with a maximum flow rate of up to 1500 GPM are permitted, although depending on the dimensions of the pump chamber, this may not be a wise choice. When the pump's revolving impeller becomes clogged with debris, the entire assembly, including the motor and the rotating impeller, needs to be taken out of the pump casing and cleaned. When it comes to huge engines, this can be a challenging undertaking. When the horsepower of the motor is greater than 50, you might need to use specialized lifting gear. The fact that these pumps are typically chosen due to their compact size means that the pump room itself can be a relatively modest space. You need to ask yourself, "Will there be sufficient room for someone else to assume this function in the future?" It is necessary to set aside some room for any future repairs that may be necessary. Installers of any pump room are advised by NFPA 20 (2013) to leave appropriate clearance for proper equipment maintenance and for clearances between individual pieces of equipment. 
The mechanical design of the vertical in-line pump (VIP) is the most cost-effective. In this design, the pump impeller is connected to the motor shaft and is fixed within the pump body. The only shaft that exists is the motor shaft, and there is nearly none in the pump. To reiterate, hydraulic balancing is not necessary for water to enter the screw pump; nonetheless, the pump has very little bearing support, making it susceptible to vibration caused by operation. This leads to a restricted use for fire pumps with a capacity of more than 750 GPM. Units with a maximum flow rate of up to 1500 GPM are permitted, although depending on the dimensions of the pump chamber, this may not be a wise choice. When the pump's revolving impeller becomes clogged with debris, the entire assembly, including the motor and the rotating impeller, needs to be taken out of the pump casing and cleaned. When it comes to huge engines, this can be a challenging undertaking. When the horsepower of the motor is greater than 50, you might need to use specialized lifting gear. The fact that these pumps are typically chosen due to their compact size means that the pump room itself can be a relatively modest space. You have to ask, "Will there be sufficient room for someone else to assume this function in the future?" It is necessary to set aside some room for any future repairs that may be necessary. 
Installers of any pump room are advised by NFPA 20 (2013) to leave appropriate clearance for proper equipment maintenance and for clearances between individual pieces of equipment. The impellers of vertical axis impeller pumps, more generally referred to as "vertical impeller" pumps, are a one-of-a-kind design feature due to the fact that they are intended to be submerged in the water supply. They are utilized in settings where the water source is positioned below pump impellers in installations. These pumps have a bowl assembly with several impellers on a vertical axis, a discharge from one impeller feeding the suction of the next impeller, etc., a shaft assembly built to a specified length, and a vacuum head assembly supporting the actuator or bevel gearbox. Additionally, these pumps have a shaft assembly built to a specified length. The only portion of a conventional vertical turbine pump that is visible in the machine room is the vacuum head assembly of the pump. These pumps come in handy in regions that not only have a limited supply of water, but also those in which the building of an above-ground water storage tank would be undesirable. It is possible to adjust practically every aspect of the pump's length and vacuum pressure when using a vertical impeller pump, which is a significant advantage. 
There is the potential for multiple fangs to be added for additional pressure. After proper installation, there is no longer any need to be concerned about air getting into the vacuum hose or starting the vehicle. When you add an additional pulse to the pump, you are effectively adding a "bite" or breakpoint to the pump's curve; as a result, unwanted excess pressure is frequently observed at lower operational flow rates. There are a few risks to using this pump. In addition to the increased expense incurred during the installation process, these pumps are notoriously difficult to keep in working order. The bomb needs to be removed from the room or deconstructed, which frequently necessitates the installation of a magic door in the room's ceiling in order for the crane to be able to raise it and check it. Because each of these pumps is constructed to order, the time it takes to deliver them can range anywhere from eight to twenty weeks, depending on the manufacturer and the specific model. Some safety measures need to be followed before the vertical turbine pump can be used for the very first time. For example, the shaft and the impellers need to be properly adjusted so that they are lifted away from the vessel enclosures before operation can begin.