Snyder Industries 4000 Gallon ASTM XLPE Double Wall Tank

Eight hundred pounds of difference, and when you do not need it

Start with the shellmate, because on this sheet that is the only comparison that matters. 5610000N42 and 5610000N30 are the same 102 by 102 by 178 inch shell as this tank, listed at 3,200 pounds; this one and 5610000N46 are listed at 2,400 pounds. The rating lines separate them the same way: this sheet reads 1.5 where the heavier listings read higher. What the 1.5 rating means in practice is on this sheet in plain figures. Four thousand gallons of water is 33,360 pounds, and the maximum contents figure here is 50,040 pounds, so this listing carries a working margin over water rather than a margin over something much denser. For water, rinse water, process water, most dilute solutions and a great many everyday plant chemicals, that is the correct tank and the heavier listing is wall you are paying to freight and to lift for no operational return. For a genuinely dense product it is the wrong row and you should be looking at its shellmate instead. Tell us the product and the strength and we will point at the right part number; that decision comes off the rating line and the chemistry, never off the suffix, which the sheet does not explain and neither will we. The lighter listing has a second, quieter benefit worth naming. Every one of these tanks arrives as one piece and has to be lifted off a trailer and walked to a position that is usually not next to the gate. Eight hundred pounds less on the same footprint changes what equipment the yard needs on the day and how many people have to be there, and on a site without a dock that is not a small thing. What it does not change is the pad. The surface has to be flat, continuous and level across the whole eight and a half foot square, never two rails and never shimmed at a corner, because the load above it is set by the water and not by the shell; the concrete pad sizing guide for above-ground polyethylene tanks sets out the framework and its boundary. Before the order, settle the volume you can actually use with the Captor double wall freeboard sizing guide, then check the delivery quantity and turnover in the tank sizing calculator and take the freeboard discipline from the tank sizing guide. Two further pieces of engineering sit behind a tank like this: the wall thickness at the vapour saturated headspace guide on why an inspection from the liquid side misses the hardest-worked part of the wall, and the cathodic disbondment testing guide for double wall interstitial spaces on how that space is examined and where the polyethylene boundary lies.

Two 4000s, a 3500 and a 4500 on one sheet

The first four rows are one shell sold four ways, and the sheet separates them only by listed weight. This tank and 5610000N46 sit at 2,400 pounds; 5610000N42 and 5610000N30 sit at 3,200. No sheet in this family explains what the codes mean, so no interpretation is offered here. Colour is the one difference with an observable consequence in the yard, and on this listing the colour field reads natural white, which means an operator standing beside the tank in good light can often read the level through the wall without any instrument at all. That is a genuine daily advantage over a black shell and it is worth weighing if nothing on the site is light sensitive. The last two rows are the size decision, and this family makes it unusually clean. Every shell here stands on the same 102 inch square, so gallons are bought entirely in height: 158 inches for 3,500, 178 for this tank's 4,000, 197 for 4,500. Nothing about the pad, the bay or the footprint changes as you move between them. That means the question is never "do I have room", it is "what is my clear height once a platform and a fill arrangement are above the manway", and the answer to that usually picks the row on its own. If the ceiling is the binding constraint, the 3,500 gallon row buys back twenty inches. If it is not, the 4,500 gallon row adds five hundred gallons for nineteen more inches and a heavier lift on the day. Work it from the clear height at the final position, not from the drawing of the floor.

Need the taller or the wider one? Every row links to its page with freight to your ZIP on each; 866-418-1777 will check the ceiling and the pad.

What a vented manway does on a tall tank

• The vent: the 18 inch manway is listed as threaded and vented, and on a vessel this shape the vent is the fitting that earns its keep. A tall, slim column moves a lot of air for a given flow rate, so the path has to stay clear on a hard pump-down and on a fast delivery alike. Inspect it every time the manway comes off and never restrict it.
• The opening: 18 inches is the only opening this sheet publishes. It serves as the fill point, the inspection hatch and the cleaning access, so everything anyone wants to do through the top competes for one hole. Decide the drop pipe, the level arrangement and the rinse method before the tank is set rather than after.
• Access: the top is at 178 inches. That is a fixed platform and a fall protection arrangement designed with the installation, not a stepladder brought out on delivery day.
• The outlet: the outlet field reads "1 Manway / Lid", which names an opening and not a pipe size, and no inlet appears on the sheet, so nothing further is claimed. Give us the duty and the line size and we will confirm what this part number carries before the pump is specified.
• The space between the walls: no monitoring port, gauge or alarm is published on this sheet. That arrangement is specified separately and is worth writing a procedure for.
• Limits: 140 F / 60 C, a specific gravity rating of 1.5, and a 3 Year Warranty.

Tell us the product when you order, because the manway seal and anything we add to it are chosen against that chemistry and nothing else.

Water, rinse and process duty at four thousand gallons

The 1.5 listing puts this tank where most large contained storage actually lives: process and rinse water at a manufacturing plant, clean-in-place and wash-down supply in food, beverage and dairy work, boiler and cooling tower make-up, dilute solution holding at a treatment works, crop input and liquid fertiliser storage at an ag retail site, and general chemical holding where the product is not much denser than water but the floor under it still matters. Four thousand gallons is the size at which a site stops managing totes and starts taking deliveries, and the second wall is what makes doing that indoors, or on a hard surface that drains somewhere, a decision rather than a gamble. Build the inspection habit in the first week: look into the space between the walls on a fixed schedule, write down that you did it and what you saw, and keep that record with the tank, because a second barrier is worth exactly what your evidence says about it. Where private fire water storage is the reason for the enquiry, that duty is sized differently and the fire water reservoir design guide for rural and remote sites is the honest place to begin; this page makes no claim about it.

Class 250, twenty-four hundred pounds, one tall shipment

Lincoln, Nebraska is the plant on this sheet, and Nebraska and West Virginia are both listed as ship-from states; both fields are printed as the sheet gives them. Freight is LTL at class 250, no NMFC number is listed, and the load is 102 by 102 by 178 inches at 2,400 pounds. Price the lane to your ZIP with the freight cost estimator; the listed price is before freight. Eight hundred pounds lighter than the heavy listings on the same envelope makes the lift easier but changes nothing about the dimensions, so the route still has to be measured for a load close to fifteen feet tall and eight and a half feet square. Walk it before the truck is booked: gate frames, overhead services, the door lintel and the turning room at the far end are what stop a delivery, not the weight. Take it under the base, never by the manway, and set it on the finished level surface in its final position before anything is plumbed in. Fill with clean water, hold the 33,360 pound load, and read the manway seal and the whole base line before you drain it. Look into the space between the walls once it is dry and record that first inspection on the shell, because every later check is compared against it. Then leave a clear walkway all the way round before the pipework goes in; the side of a tank nobody can reach is the side nobody ever inspects. A strap that is checked once a season is a strap that holds; put it on the same calendar as the gutters.