My Doomsday Shelter Unlimited Upgrades

The soil on the side of the green belt is generally loose because the roots of trees have grown in it.

After all, this is a golf course, even if it is a golf course, the soil layer is not as fragile as imagined.

So it only took an hour.

After working for more than an hour, Chen Yang added a little water.

After swiping my phone for a while, I took a short break in the pit.

Jiang Yanbing, on the other hand, went back to the refuge to rest. He told Jiang Yanbing just now that there is an air conditioner in his room, and he can let her go back and turn on the air conditioner first.

To get rid of Jiang Yanbing, rest is one aspect. In fact, he still has to start using the system's capabilities.

Chen Yang is not a professional water tank designer, and he certainly doesn't understand so many details, but as long as he knows the general direction, the rest will be left to the system.

The first is the concrete floor.

It is the first time for Chen Yang to use concrete as a material.

The main reason is that concrete is prone to ash, and it is not very clean to use it as a general container.

With a concrete panel of 5m5m and a thickness of about 2 decimeters, Chen Yang used a total of more than 50 units of concrete to complete the production of the bottom slab.

As soon as the concrete floor was placed in the pit, it immediately compacted the soil below.

Under this weight, it is simply impossible to float the bottom plate only by the buoyancy of rainwater.

With the bottom plate, the next step is the body of the water tank.

The main body is still made of alloy, and the bottom is not sealed. More than 50 units of alloy are also used.

The height is 1.5m, the length and width are 4m, and it is placed on the concrete floor of 5m5m, just right.

4m4m1.5m is a space of 24 square meters.

24 square meters, in conversion, it can hold 24 tons of water!

With this capacity, there is no problem at all as a water supply tank for a residential building before the end of the world.

"Is it a bit big?"

Looking at the huge pit in front of him, Chen Yang scratched his head in embarrassment.

What he thought before was to make the container bigger so that it would be easier to upgrade.

Although more Survival Points are used, they are actually the same as the Survival Points required to upgrade capacity.

It's just that there are a few upgrade steps missing, and there is no need to upgrade the capacity in the future.

But when it was actually done, Chen Yang felt that he made some mistakes in judgment this time.

24 tons of water, full of water can be used for two or three months is not a problem.

Although he is for waste water, and waste water is not universally converted into filtered water.

But even if calculated according to the efficiency of 70%, 1 ton of waste water can produce 0.7 tons of pure water, and 24 tons of waste water can produce nearly 17 tons of water, which is not a small amount.

Moreover, it contains more than ten tons of water, which is not quantum water. Ordinary water is easy to breed various bacteria if it is left for a long time, and the water will turn rancid.

"What should we do?" Chen Yang looked at the big water tank in Keng Li Nuo, feeling worried for a while.

Whether it is used to hold waste water or ordinary water, the volume of this water tank is a bit too large.

But Chen Yang immediately had an idea:

"How about changing to a double-layer water tank?"

"One layer is filled with waste water, and the other layer is filled with ordinary water. If the water tank in my shelter is not enough, it can be connected to this water tank again."

"24 divided into two is 12 tons... Hey, anyway, it is much better than before."

It was just a thought, so Chen Yang used several units of alloy to make a layer of baffle in the middle of the water tank.

In this way, waste water can be installed on the left side, and ordinary water can be installed on the right side.

Chen Yang felt that it was not easy to fill the 1.5-ton water tank in his shelter, let alone the 15-ton water tank.

But everything is just in case.

What if there is too much water?

Chen Yang once again found a reason for his lying down mentality.

In fact, he just simply didn't want to dig another hole.

After finishing the five-sided alloy water tank, Chen Yang covered it to the concrete floor through the system.

After connecting the water pipe to the originally reserved hole, Chen Yang casually poured some waste water into it, and the system popped up a prompt.

[Self-made buried water tank]:

Very crude tank.

Upgrade Direction 300: Upgrade to a professional water tank, which requires [-] Survival Points for a large number of problems such as water leakage and poor stability at this stage.

Upgrade Direction 550: Change the material of the water tank, greatly enhance the corrosion resistance of the water tank, and require [-] survival points.

Upgrade direction three: add a temperature control system, which can control the water temperature in the water tank in real time, and requires 800 survival points.

Upgrade Direction 1050: To reduce the volume of the water tank while maintaining the volume, [-] survival points are required.

System comment: You have a lot of water, you can't stand the spicy food!

Seeing the system's complaints, Chen Yang was completely speechless.

Why do you always feel that something is not right?

But the survival points needed for this upgrade are really expensive!

"300, 550, 800, 1050...how about arithmetic progression with my brother here?"

There is an interval of 250 between each number. Why does it feel that something is not right?

But this survival point is indeed too much, Chen Yang summed it up, probably because his water tank is too big.

Get a layer of anti-corrosion material, 550 survival points.

In all fairness, the asking price is reasonable.