Because it's better than the pipe laying on stones that may have sharp edges.
laying in sand laying in sand
To repair a copper pipe using epoxy, follow these best practices: Clean the pipe thoroughly before applying the epoxy. Mix the epoxy according to the manufacturer's instructions. Apply the epoxy to the damaged area and allow it to cure completely. Sand the epoxy down to create a smooth surface. Test the repair by running water through the pipe before using it.
Whether or not you need to use sand as a base in laying a sidewalk depends upon what you are laying it with. For example, if you were using bricks, it would be better to use a sand base to prevent the bricks from shifting over time.
The best type of sand to use for laying under pavers is coarse sand. It provides a stable base and allows for proper drainage.
The fertilizer should go in the topsoil where the grass and plants can use it.
The sand has a higher conductivity.
Loading sand media. Filter sand media is loaded through the top opening of the filter. Remove the top diffuser from the internal diffuser elbow pipe and place flexible automatic air relief tube to the side, out of the way, inside the tank. Cap the internal diffuser elbow pipe with sand shield provided to prevent sand from entering it. It is good practice to fill tank approximately 1/2 way with water to provide a cushioning effect when the filter sand is poured in. This helps protect the underdrain laterals from excessive shock. (Be sure the drain cap is securely in place on drain pipe. Apply wrench to flats on pipe when tightening cap.) Note: Check to confirm all laterals are in the down position before loading with sand. (See Figure A on Page 2.) Carefully pour in correct amount and grade of filter sand, as specified. Sand surface should be leveled and should come to about the center of the flange of the filter tank. Use no more than the recommended amount of sand. Remove sand shield from internal diffuser elbow pipe. Replace diffuser on internal diffuser elbow pipe, positioning automatic air relief tube through the hole provided in the diffuser. Align tab on diffuser with slot in pipe and gently press down. Carefully clean off top seal O-ring and screw access dome, with manual air relief, securely into the filter head.
Broken pipe
A turtle laying eggs in the sand.
What kind of pipe, the inside or outside, or a tobacco pipe? If it is copper pipe, you can use an emery sand cloth or steel wool.
Usually from people taking showers whilst covered in sand.
Great question they have a Tubacial pipe what runs from a station and deep under the sand, they put specials hollow marks on the thing there burrying but they don't do it so often anymore back in the olden days they did when a town was pollutated they would put some under the sand. But how did they get the tube down there? By an underwater cave they put it in the cave and since the water was so deep it went all the way down into the sand since the pipe was soo strong.