Snyder Industries 175 Gallon HDLPE Open Top Tank Natural White 1.35SG

Shallow, wide and open: the duty that wants this shape

The duty here is work done with the hands and the eyes, at arm's length, over a rim that is deliberately low. Thirty inches is waist height on most people. From there you can reach the bottom of the tank without leaning in, see the whole surface at once, lower something into it and lift it back out without a hoist, sweep a scoop across the floor of it, and work beside it for a shift without your shoulders paying for the rim height. That is the argument for a shallow open tank and it is a real one, because the alternative is a taller vessel of the same volume where every one of those jobs becomes awkward. The 42 inch plan is the other half of the design. A wide, shallow liquid body has a large surface area for its volume, which helps anything being dissolved, aerated, cooled, settled or skimmed, and which also means a shallow tank is the wrong choice where evaporation, dust or splash is the enemy. You buy this shape for access and you accept an open, wide surface as the price. The rating is worth noting before the shortlist gets any longer. This wall is rated at a specific gravity of 1.35, which the maker puts in the product's own name, and it is a lower rating than most of the tanks it will sit beside in a catalogue. If your product is heavier than water, read that number first and let it decide the shortlist before the ergonomics do. Support it on flat, continuous, level bearing across the whole 42 inch plan, because a shallow wide tank loaded to 1,460 pounds of water, and 2,043 pounds at the rating, spreads its load over a large base and will find any dip or soft board under it. Where that surface is poured rather than structural, the concrete pad sizing guide for above-ground polyethylene tanks sets out the framework and its boundary. Size the working volume in the tank sizing calculator and take the freeboard from the tank sizing guide, and then leave extra on an open tank, because the freeboard is what absorbs a vigorous stir, a dropped part and a heavy rain if it is outdoors.

A hundred and twenty tall, two hundred with a cover, this one bare

Three open tops and three different shapes for the same general job. This tank is the shallow wide one at 42 inches across and only 30 inches tall. SII-570TDVOT-45 is the opposite: 120 gallons in a 30 inch plan standing 46.6 inches tall at 50 pounds, a tall narrow column that takes far less floor and puts the rim more than sixteen inches higher. SII-57200VOT45 holds 200 gallons on a 36 inch plan at 53 inches tall and 85 pounds, and it is the tallest of the three by some way. One thing about that part is worth saying precisely: the sheet names it as coming with a loose cover and protective wrap. That cover belongs to that part's name and not to this one, because this sheet gives this tank no lid and no manway field at all. If a cover is part of what you need, that is the row to ask about. Otherwise the choice is a straight trade between floor and reach. This tank takes the most floor and gives the easiest access; the 120 takes the least floor and asks the most of the operator's shoulders; the 200 holds the most and asks the most of both. Where several of these stand in a row in one room, keeping them on one plan makes the pads and the spill trays interchangeable, and the only variable left is what goes in each one.

Pad already poured? Send its size to 866-418-1777 or in a quote request and we will match a row to it, freight to your ZIP included.

No outlet and no lid: how the liquid leaves

• The discharge: this sheet publishes no outlet, no inlet and no bulkhead, so no size, thread or position is claimed. On an open tank with no published outlet the liquid leaves over the top, which means a pump, a siphon or a portable transfer unit, and the first design decision is where that pump stands and how its line is supported. Tell us how you intend to empty it and we will confirm what the part carries before it ships.
• Suction geometry on a shallow tank: at 30 inches deep there is not much column above a foot valve, so a suction that is set too high loses prime early and one set on the floor picks up whatever has settled. Set it clear of the bottom on its own bracket, and accept that the last inch of a shallow tank comes out with a different method than the first 170 gallons.
• Total drain and cleaning: nothing on this sheet drains the vessel, so cleaning is done in place with the tank tipped, pumped or bailed. On a 42 inch plan that is genuinely practical by hand, which is one of the advantages of the shallow shape.
• The top: no lid, no manway and no cover is published, so none is claimed and no seal and no vent is asserted. What is open stays open, and that has to be designed for: splash, evaporation, dust, rain and anything that can fall in.
• Level: no gauge and no graduation is published. On a shallow open tank the level is read by eye across a wide surface, which is easy at a glance and poor at precision; mark a working line on the inside wall if the batch has to be repeatable.
• Limits: the specific gravity rating of 1.35 is the only rating this sheet carries. There is no maximum operating temperature and no warranty term on it, and neither is claimed here.

Tell us the liquid when you order so any fitting we add is matched to it. On an open tank with a low rim, the guarding, the access and what can reach into the vessel are part of the installation and not an afterthought.

Wash, dip, rinse and holding at arm's length

A wide shallow open tank goes into parts washing and dip work in machine and fabrication shops, quench and rinse stations, plating and finishing lines, hide, textile and leather processing, aquaculture and hatchery holding where surface area and access both matter, greenhouse and nursery mixing and dipping, food processing wash and soak duty, and settling or skimming work where somebody has to get at the surface or the floor of the vessel. It also does plain holding duty for water and rinse water on sites where the vessel has to be emptied and cleaned frequently. Where the vessel is part of a stored water reserve rather than a process step, the rural and remote site fire water reservoir design guide sets out the sizing discipline and the freeze protection engineering that duty needs, and the 175 gallon liquid storage buyer's guide covers this volume as a class. Buy the shape for the work, not for the gallons.

Merced, California, seventy-five pounds

This tank is moulded at Merced, California, which puts the West Coast and the Southwest on the short lane. The sheet gives the freight class as LTL, a shipping mode rather than a numeric class, under NMFC 156600, and it measures 42 inches square by 30 inches tall. Price the lane to your ZIP with the freight cost estimator; the listed price is before freight. At 75 pounds it is a comfortable two-person lift or a one-person job with a pallet jack, taken under the body. An open tank with nothing over it travels as an open container, so look inside it before it goes near a process and wash it out whatever it looks like. Set it on its final level support, then fill it with clean water and hold that 1,460 pound load while you read the base and the wall all the way round, paying attention to the edge of the plan where a wide shallow tank puts most of its load. Drain it and dry it before the working liquid goes in. Then mark the working level on the inside wall in permanent marker and, on a tank this wide, mark it in two places opposite each other; a shallow open tank reads differently depending on where you stand, and two marks settle the argument. Tape a copy of the spec sheet inside the control panel door; the next person to touch the tank will not have the box it came in.